Answers
Answer:
cephalocaudal
Explanation:
cephalocaudal development means vertical growth of the spine downward.
it consists of development starting at the top of the body and working its way down (from head to feet)
not to be confused with proximodistal.
in proximodistal growth, growth starts from the torso, or the body's center, and moves outwards, to the arms and the legs.
hope this helps:)
Related Questions
Earth rotate once every 24 hours. In a reference frame fixed to Earth, how far does
a point on the equator move in 1 hour? RE = 6.34×106 m
Answers
In a reference frame fixed to Earth, a point on the equator moves zero distance in 1 hour.
What is the frame of reference?A frame of reference in physics is made up of an abstract coordinate system and the collection of physical reference points that fix the coordinate system specifically and regulate measurements inside it.
When we take a reference frame fixed to Earth, the displacement due to earth's rotation can not be measured. So, any point on earth remains in rest through out the day with respect to the reference frame fixed to Earth. Hence, a point on the equator moves no distance in 1 hour in a reference frame fixed to Earth.
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Three boxes, A, B, and C, are placed on a frictionless surface as shown in the diagram below. If you push on box A with a force of 8.25 N, find the contact force (in N) between each pair of boxes. Here mA = 6.25 kg, mB = 3.25 kg, and mC = 1.50 kg. contact force between A and B N contact force between B and C N
Answers
The contact force (in N) between each pair of boxes is mathematically given as
F_{ab} = 3.56 N
F_{bc} = 1.2 N
What is the contact force (in N) between each pair of boxes.?Generally, Any force that is generated as a consequence of two objects coming into touch with one another is referred to as a contact force. Contact forces are present everywhere and are the cause of the vast majority of macroscopic groupings of matter's obvious interactions with one another.
In conclusion, The equation for is Acceleration of the system is mathematically given as
a = 8.25 / (5.85 + 2.95 + 1.50)
a= 0.8 m/s^2
Therefore
F_{ab} = (Mb + Mc)*a
F_{ab} = (2.95 + 1.50) * 0.8
F_{ab} = 3.56 N
F_{bc} = Mc * a
F_{bc}= 1.5 * 0.8
F_{bc} = 1.2 N
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According to the Keynesian view, manipulating foreign sector spending is not a reliable way to move the U.S. economy toward a more acceptable equilibrium because __________.
Answers
According to the Keynesian view, manipulating foreign sector spending is not a reliable way to move the U.S. economy toward a more acceptable equilibrium because it does not address the fundamental causes of economic instability.
Keynesian economics focuses on the role of domestic demand in driving economic growth and stability. The government can use fiscal and monetary policy to stimulate aggregate demand and promote full employment. However, changes in foreign sector spending can be unpredictable and beyond the control of domestic policymakers. For instance, an increase in foreign demand for U.S. exports could boost economic growth and employment in the short run, but it may not be sustainable if the foreign demand later decreases. Similarly, a decrease in foreign demand for U.S. exports could have negative short-term effects on the economy, but it may not necessarily lead to a long-term decline. In short, Keynesian economics emphasizes the importance of domestic demand management and stabilizing the economy through government intervention. While changes in foreign sector spending can have some impact on the economy, they are generally seen as unreliable and unpredictable, and therefore not a reliable tool for achieving economic stability in the long run.
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Suppose you are asked to come up with a design for a new mobile phone that uses solar energy as its energy source. Give examples of one criterion and one constraint for this mobile phone.
Answers
The need for an effective solar power system and restrictions on using solar power for mobile devices are requirements.
What is solar energy?Any energy produced by the sun is referred to as solar energy. Solar energy is produced by the nuclear fusion that occurs in the sun. Helium atoms are produced during fusion inside the sun's core when protons from colliding hydrogen atoms fuse. Solar architecture, solar thermal energy, and solar power to generate electricity are only a few examples of the technologies that can harness the Sun's radiant light and heat.
Why solar is important and why it is used?When you generate power with solar panels, no emissions of greenhouse gases are put into the atmosphere. Solar energy is a key source of energy in the transition to the creation of clean energy since the sun produces more energy than humans could ever require.
Solar energy seems to be a cheap, abundant, and renewable source of power. It may be used to make energy, heat water, and cook meals. Solar cells can also be used to store the electrical energy produced by solar energy.
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A 39.4 kg beam is attached to a wall with a link and its far end is supported by a cable such that the angle between the beam and the cable is 90 degrees. If the beam is inclined at an angle of theta = 33.1 degrees with respect to horizontal, what is the magnitude of the horizontal component of the force exerted by the link on the beam?
Answers
Answer:
192.6N
Explanation:
Let's consider the forces acting on the beam:
Weight of the beam (W): It acts vertically downward and has a magnitude of W = mass * gravitational acceleration = 39.4 kg * 9.8 m/s^2.
Force exerted by the link on the beam (F_link): It acts at an angle of 90 degrees with respect to the beam and has two components: the vertical component and the horizontal component.
Tension in the cable (T): It supports the far end of the beam and acts at an angle of 90 degrees with respect to the beam. Since the angle between the beam and the cable is 90 degrees, the tension in the cable only has a vertical component.
Let's break down the forces acting on the beam:
Vertical forces:
W (weight of the beam) - T (vertical component of tension) = 0
T = W
Horizontal forces:
F_link (horizontal component of the force exerted by the link) = ?
To find the magnitude of the horizontal component of the force exerted by the link on the beam (F_link), we need to consider the equilibrium of forces in the horizontal direction.
Since the beam is inclined at an angle of θ = 33.1 degrees with respect to the horizontal, the horizontal equilibrium equation can be written as:
F_link = W * sin(θ)
Let's substitute the given values:
W = 39.4 kg * 9.8 m/s^2
θ = 33.1 degrees
F_link ≈ (39.4 kg * 9.8 m/s^2) * sin(33.1 degrees)
Using a calculator, we find that the magnitude of the horizontal component of the force exerted by the link on the beam (F_link) is approximately 192.6 N.
Heather and Jerry are standing on a bridge 46 m
above a river. Heather throws a rock straight down with a speed of 14 m/s
. Jerry, at exactly the same instant of time, throws a rock straight up with the same speed. Ignore air resistance. How much time elapses between the first splash and the second splash?
Answers
The time elapsed between the first splash and the second splash is approximately 0.69 seconds.
To calculate this, we consider the motion of two rocks thrown simultaneously from a bridge. Heather throws a rock straight down with a speed of 14 m/s, while Jerry throws a rock straight up with the same speed.
We use the equation for displacement in uniformly accelerated motion: s = ut + (1/2)at^2.
For Heather's rock, which is thrown downwards, the initial velocity (u) is positive and the acceleration (a) due to gravity is negative (-9.8 m/s^2). The displacement (s) is the height of the bridge (46 m).
Solving the equation, we find two possible values for the time (t): t ≈ -4.91 s and t ≈ 1.91 s.
Since time cannot be negative in this context, we discard the negative value and consider t ≈ 1.91 s as the time it takes for Heather's rock to hit the water.
For Jerry's rock, thrown upwards, we use the same equation with the same initial velocity and acceleration. The displacement is also the height of the bridge, but negative.
Solving the equation, we find t ≈ -5.68 s and t ≈ 1.22 s. Again, we discard the negative value and consider t ≈ 1.22 s as the time it takes for Jerry's rock to reach its maximum height before falling back down.
To find the time difference between the first and second splash, we subtract t ≈ 1.91 s (Heather's rock) from t ≈ 1.22 s (Jerry's rock). This gives us a time difference of approximately 0.69 seconds.
Therefore, the time elapsed between the first splash and the second splash is approximately 0.69 seconds.
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A person standing at the edge of a cliff throws one ball straight up and another ball straight down, each at the same initial speed. Neglecting air resistance, which ball hits the ground below the cliff with the greater speed?
Answers
When a person standing at the edge of a cliff throws one ball straight up and another ball straight down, each at the same initial speed, neglecting air resistance, the ball that hits the ground below the cliff with the greater speed is the ball that was thrown straight up.
What is the acceleration due to gravity?The acceleration due to gravity is the acceleration that is produced in an object due to the gravitational force of the earth acting on the object.
The velocity of an object depends on the acceleration due to gravity and the height above the ground of an object as given below:
Velocity = √2gh
where;
g is the acceleration due to gravity
h is the height above the ground
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The five general principles from the APA are meant to __________. A. be enforceable rules B. be posted in every office C. guide and inspire good conduct D. stand up in court Please select the best answer from the choices provided
Answers
The five general principles from the APA are meant to: C. Guide and inspire good conduct.
The energy that a substance contains is
a. equilibrium
b. heat
c. thermal energy
d. entropy
Answers
The energy that a substance contains is known as heat. Thus, the correct option for this question is B.
What is Entropy?Entropy may be characterized as the measurement of the degree of randomness or in other words, it is the increase in the disorganization within a system. It is the measure of a system's thermal energy per unit temperature that is unavailable for doing useful work.
Equilibrium is a state of balance between opposing forces or actions that is either static or dynamic. It symbolizes the circumstance of being balanced in nature.
Thermal energy is a type of energy that is significantly contained within a system that is responsible for its temperature. Heat is the flow of thermal energy.
Therefore, the energy that a substance contains is known as heat. Thus, the correct option for this question is B.
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A horizontal clothesline is tied between 2 poles, 12 meters apart. When a mass of 1 kilograms is tied to the middle of the clothesline, it sags a distance of 4 meters. What is the magnitude of the tension on the ends of the clothesline
Answers
Answer:
The tension on the clotheslines is \(T = 8.83 \ N\)
Explanation:
The diagram illustrating this question is shown on the first uploaded image
From the question we are told that
The distance between the two poles is \(d = 12 \ m\)
The mass tie to the middle of the clotheslines \(m = 1 \ kg\)
The length at which the clotheslines sags is \(l = 4 \ m\)
Generally the weight due to gravity at the middle of the clotheslines is mathematically represented as
\(W = mg\)
let the angle which the tension on the clotheslines makes with the horizontal be \(\theta\) which mathematically evaluated using the SOHCAHTOA as follows
\(Tan \theta = \frac{ 4}{6}\)
=> \(\theta = tan^{-1}[\frac{4}{6} ]\)
=> \(\theta = 33.70^o\)
So the vertical component of this tension is mathematically represented a
\(T_y = 2* Tsin \theta\)
Now at equilibrium the net horizontal force is zero which implies that
\(T_y - mg = 0\)
=> \(T sin \theta - mg = 0\)
substituting values
\(T = \frac{m*g}{sin (\theta )}\)
substituting values
\(T = \frac{1 *9.8}{2 * sin (33.70 )}\)
\(T = 8.83 \ N\)
after a great many contacts with the charged ball, how is any charge on the rod arranged (when the charged ball is far away)? select the best description. view available hint(s)for part b after a great many contacts with the charged ball, how is any charge on the rod arranged (when the charged ball is far away)?select the best description. positive charge on end b and negative charge on end a negative charge spread evenly on both negative charge on end a with end b remaining neutral both ends neutral positive charge spread evenly on both previous answers
Answers
After a great many contacts with a charged ball, the charge on the rod is arranged in such a way that the rod becomes neutral.
This is because of the process of electrical conduction, where electrons from the charged ball transfer to the rod, effectively neutralizing the charge on the ball and creating a charge distribution on the rod. Initially, the ball has an excess of electrons, which gives it a negative charge. When it comes into contact with the rod, some of these electrons transfer to the rod, creating a negative charge at one end and a positive charge at the other end. However, over time and with multiple contacts, the charges on the rod redistribute and balance out, effectively neutralizing the rod. The end result is that both ends of the rod become neutral, with no excess of electrons or shortage of electrons at either end. This process occurs because the electrons on the rod move freely and can move to any location on the rod where there is a shortage or excess of electrons.To know more about charges visit:
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A slingshot fires a pebble from the top of a building at a speed of 13.0 m/s. The building is 22.0 m tall. Ignoring air resistance, find the speed with which the pebble strikes the ground when the pebble is fired (a) horizontally, (b) vertically straight up, and (c) vertically straight down.
Answers
Vf = sqrt(Vi^2 + 2g*d), where
Vi = initial velocity (13 m/s)
g = acceleration due to gravity (9.8 m/s^2)
d = change in vertical position (22 m)
(a) Horizontally: The pebble does not fall, so its velocity does not change, thus Vf = 13 m/s.
(b) Vertically straight up: The change in vertical position (d) is positive, so the final velocity will be less than the initial velocity.
Vf = sqrt(13^2 + 2 * 9.8 * 22) = sqrt(13^2 + 437.6) = sqrt(437.6 + 169) = sqrt(606.6) = 24.7 m/s
(c) Vertically straight down: The change in vertical position (d) is negative, so the final velocity will be greater than the initial velocity.
Vf = sqrt(13^2 - 2 * 9.8 * 22) = sqrt(13^2 - 437.6) = sqrt(169 - 437.6) = sqrt(-268.6) = not defined (velocity is imaginary)
I did not have paper so I may have got a couple things wrong .
Which observation is the best evidence that some colors of visible light are
being absorbed in this photo?
A. The man's head is distorted under the water.
B. The top of the man's head appears disconnected.
C. The shape of the man's arm is clearly seen underwater.
D. The snorkel in the man's mouth appears yellow.
Answers
Answer:
D-The snorkel in the mans mouth appears yellow
Explanation:
Answer D is the only example related visible light being absorbed.
800 g of water and 160 g of alcohol are placed in a container. Knowing that the density of alcohol is 0.8 g / mL then the density (in g / mL) of the mixture obtained is:
Answers
Answer:
0.96 g/mL
Explanation:
The volume of 800 g of water is:
(800 g) / (1 g/mL) = 800 mL
The volume of 160 g of alcohol is:
(160 g) / (0.8 g/mL) = 200 mL
Density = mass / volume
ρ = (800 g + 160 g) / (800 mL + 200 mL)
ρ = 0.96 g/mL
(6)
A 100 W heater is connected to a 240 V mains supply. Calculate the:
current drawn;
resistance of the hheater.I want to know how to go about it
Answers
Answer:
Current drawn = 0.417 A (rounded to 3 significant figures)
Resistance = 576Ω (rounded to 3 significant figures)
Explanation:
Current = Power ÷ Voltage
Current = 100W / 240V
∴ Current = 0.416666666.... = 0.417A
Resistance = Voltage ÷ Current
Resistance = 240 ÷ 0.417
∴ Resistance = 575.539 = 576Ω
What work is done by a forklift raising a 583 kg box a distance of 1.2 m?
Answers
The work that is done by a forklift raising a 583 kg box a distance of 1.2m is 699.6N.
How to calculate work done?Work refers to the measure of energy expended in moving an object. It is most commonly calculated by multiplying the force by the distance.
This means that no work is done if the object does not move. This means that the work done can be calculated as follows:
Work done = Force × distance
According to this question, a forklift raises a 583kg box over a distance of 1.2m. The work done can be calculated as follows:
Work done = 583kg × 1.2m
Work done = 699.6N
Therefore, 699.6N is the force required to lift the box.
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The diagrams show four bodies moving in the directions shown. The only forces acting on the bodies are shown in each diagram.
Which body gains the most kinetic energy when moving a distance of 1.0m ?
Answers
Answer:
C - the greatest net force is on c with 25N - 10N = 15N
a = F / M
a = (v2 - v1) / t so C has the greatest acceleration and will reach the greatest velocity
KE = 1/2 M v^2
The diagrams show four bodies moving in the directions shown. The only forces acting on the bodies are shown in each diagram. The option C body gains the most kinetic energy when moving a distance of 1.0m.
What is kinetic energy?When some amount of force is applied on a object it can store a energy in that object. That is the kinetic energy. Mathematically the mass of the object and its change in acceleration in that object makes the kinetic energy. It is a vector quantity.
How can we calculate the kinetic energy?
To calculate the kinetic energy we are using the formula,
U= (1/2)mv²
U = (1/2) ma²t²
Or, U= (1/2)ma × at²
Or, U= F × (1/2)at²
From this calculation we can see that if there is more force applied on a body that generates more kinetic energy on that object.
According to the question ,
Force of the object of Option A has (F) = f₂ - f₁
= (20 - 10)
= 10N
Force of the object of Option B has (F) = 10N
Force of the object of Option C has (F) = f₂ - f₁
=(25-10)= 15N
Force of the object of Option D has (F) = f₂ - f₁
= (30-30)
= 0N
According to the question, option C has the most amount of force and we know the more force generate the more kinetic energy. So it has the more kinetic energy.
We can easily say that, The option C body gains the most kinetic energy when moving a distance of 1.0m
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"In order to eliminate glare from a horizontal surface such as water, what is the orientation of the polarizing axes in polarizing sunglasses?"
Answers
Answer
Polaroid sunglasses with transmission axes that are oriented vertically so the glasses absorb the horizontally polarised light and as the glare is composed of that orientation of light they therefore reduce the glare.
6.
least 2 m. If the same car is moving with the speed 80K/h,what is the minimum stopping distance?
A car moving with a speed of 40 km/h can be stopped by applying the brakes after at-
Answers
The minimum stopping distance of the car is determined as 8 m.
What is the minimum stopping distance?The minimum stopping distance of the car is calculated as follows;
d = (u²)/(2a)
where;
d is the minimum stopping distanceu is the initial velocitya is the acceleration of the carwhen the minimum stopping distance = 2 m, initial velocity = 40 km/hr = 11.11 m/s
2 = (11.11²)/(2a)
a = (11.11²)/(2 x 2)
a = 30.86 m/s²
when the speed becomes 80 km/h, the minimum stopping distance is calculated as;
u = 80 km/h = 22.22 m/s
d = (22.22² )/ (2 x 30.86)
d = 8 m
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Step 7: Explore the Effect of Adding More Mass to the String.
Calculate the average time it took the car to travel 0.25 and 0.50 meters with the three washers attached to the pulley. Record the averages, rounded to two decimal places, in Table C of your Student Guide.
What is the average time it took the car to travel 0.25 meters? _____ seconds.
What is the average time it took the car to travel 0.50 meters? _____ seconds.
Answers
Answer:
1.92
2.61
Explanation:
The average time taken by the car to cover a distance of 0.25 meters and 0.50 meters which is based on the three trial times are :
Distance of 0.25 meters = 2.23 seconds
Distance of 0.50 meters = 3.13 seconds
What is Distance?Distance is defined as a numerical or sometimes a qualitative measure of how far objects or points are. Distance can be described as a physical length or as an approximation based on other criteria.
It can be calculated by:
Distance= Speed x time
Where, Distance is in Meter or kilometer
Speed is in meter per second or km/min
Time is in seconds or minutes
From the above formula, we can also calculate the time like for above given information,
Average travel time to cover 0.25 meters :
(Trial 1 time + Trial 2 time + Trial 3 time) ÷ 3
(2.24 + 2.21 + 2.23) ÷ 3
(6.68 ÷ 3) = 2.226667 = 2.23 seconds
Average travel time to cover 0.50 meters :
(Trial 1 time + Trial 2 time + Trial 3 time) ÷ 3
(3.16 + 3.08 + 3.15) ÷ 3
9.39 ÷ 3 = 3.13 seconds
Thus, the average time taken to cover 0.25 and 0.50 meters are 2.23 and 3.13 seconds respectively
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As the shuttle bus comes to a sudden stop to avoid hitting a dog. It accelerates unfirmly at -4.1m/s^2 as it slow down from 9.0m/s to 0.0m/s. Find the interval of acceleration for the bus
Answers
The interval of acceleration of the bus will be 2.19 seconds.
What is acceleration?An object is considered to have been accelerated if its velocity changes. Depending on whether an object is moving faster, slower, or in a different direction, its velocity may change.
Examples of acceleration include a falling apple, the moon orbiting the earth, and a car that has stopped at a stop sign. These examples demonstrate how acceleration occurs whenever a moving object modifies its direction, speed, or both.
Acceleration is a vector quantity.
SI unit of acceleration is m/s.
According to the question, the given values are :
Acceleration, a=-4.1 m/s²
Initial velocity, u=9.0 m/s and,
Final velocity, v=0 m/s
By using Equation of motion, i.e.,
v=u+at
⇒0 m/s=9m/s+(-4.1 m/s²)(t)
⇒-9 m/s=-4.1 m/s²×t
t=(-9 m/s)/(-4.1 m/s²)
t= 2.19 seconds.
Hence, the time interval of acceleration of the bus will be 2.19 seconds.
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d) A Body of mass 12.0 kg is placed on an orange tree 20.0 metres above the ground.
i. Calculate its potential energy with respect to the ground.
ii. If the body is released from this height, what will be its kinetic energy just before it hits the ground.
[Take g = 10 ms2]
Answers
Answer:
here's the answer
Explanation:
given:
h= 20.0m
M= 12.0kg
g=10m/s²
solution:
potential energy = mgh = (12.0kg)(10m/s²)(20.0m)
= 2400
potential energy = 2400J
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Materials expand when heated. Consider a metal rod of length L0 at temperature T0. If the temperature is changed by an amount ΔT, then the rod’s length changes by ΔL=????L0ΔT, where ???? is the thermal expansion coefficient. For steel, ????=1.24×10−5∘C−1. (a) A steel rod has length L0=70cm at T0=70∘C. What is its length at T=110∘C?
Answers
Answer:
\(\Rightarrow L=70 .03472 cm\)
Explanation:
For convenience, let's represent the thermal expansion coefficient by \(\alpha\), i.e. \(????=\alpha\).
Given that, for steel \(\alpha =1.24\times 10^{-5}\) °\(C^{-1}\),
initial length, \(L_0=70 cm\), initial temperature, \(T_0=70\) °\(C\), and the final temperature, \(T=110\) °\(C\).
Let the length of the rod at \(T=110\) °\(C\) be \(L\).
Now, change in length, \(\Delta L=\alpha L_0 \Delta T\)
\(\Rightarrow \Delta L=\alpha L_0 (T-T_0)\)
\(\Rightarrow L-L_0=1.24\times 10^{-5}\times 70 (110-70)\)
\(\Rightarrow L-70=1.24\times 10^{-5}\times 70 \times 40\)
\(\Rightarrow L=70 + 0.03472 cm\)
\(\Rightarrow L=70 .03472 cm\)
Hence, the length of the rod at \(T=110\) °\(C\) be \(70.03472 cm\).
Two charges separated a distance of 1.0 meter exert a 2.0-N force on each other. If the charges are pushed to a separation of 1/3 meter, the force on each charge will be?
Answers
ANSWER:
18 N
STEP-BY-STEP EXPLANATION:
Force between two charge particles is given by:
\(F=k\frac{q_1\cdot q_2}{d^2}\)We can make the following relationship:
\(\begin{gathered} F_1=k\frac{q_1\cdot q_2}{d_1^2} \\ \\ F_2=k\frac{q_1\cdot q_2}{d_2^2} \\ \\ \frac{F_2}{F_1}=\frac{k\frac{q_1\cdot q_2}{d_2^2}}{k\frac{q_1\cdot q_2}{d_1^2}} \\ \\ \frac{F_2}{F_1}=\frac{d_2^2}{d_1^2} \\ \\ \frac{F_{2}}{F_{1}}=\left(\frac{d_1}{d_2}\right)^2 \end{gathered}\)Therefore, we can establish the following:
\(\begin{gathered} \frac{F_2}{F_1}=\left(\frac{d_1}{d_2}\right)^2 \\ \\ \text{ We replacing:} \\ \\ \frac{F_2}{2}=\left(\frac{1}{\frac{1}{3}}\right)^2 \\ \\ F_2=2\cdot9 \\ \\ F_2=18\text{ N} \end{gathered}\)Therefore, the force will now be 18 N at each charge.
What type of reflection would you get from a rough surface?
Answers
For a rough surface, reflected light rays scatter in all directions. This is called diffuse reflection. Diffuse reflection is when light hits an object and reflects in lots of different directions. This happens when the surface is rough.
Question 3 of 10
The Moon has much less gravitational force than Earth. What would happen
if you went to the Moon?
OA. Your mass would decrease.
O
B. Your weight would increase.
O
C. Your mass would increase.
O
D. Your weight would decrease.
SUBMIT
Answers
Answer:
D
Explanation:
Mass is the amount of matter your body has ....does not change on the Moon.
there is less gravity .....so your WEIGHT would decrease
How does energy change from kinetic to potential?
Answers
Answer:
A: An object has potential energy (stored energy) when it is not in motion. Once a force has been applied or it begins to move the potential energy changes to kinetic energy (energy of motion).
Explanation:
Two blocks, M1 and M2, are connected by a massless string that passes over a massless pulley as shown in the figure. M2, which has a mass of 19.0 kg,
rests on a long ramp of angle theta=25.0∘.
Ignore friction, and let up the ramp define the positive direction.
If the actual mass of M1 is 5.00 kg and the system is allowed to move, what is the acceleration of the two blocks?
What distance does block M2 move in 2.00 s?
Answers
The acceleration of the two blocks is\(2.14 m/s^{2\)} and the distance does block M2 move in 2.00 s is 4.27 m.
Now we need to find the acceleration of the two blocks and the distance does block M2 move in 2.00 s.
We know that: mass of M1, m1 = 5.00 kg mass of M2, m2 = 19.0 kgθ = 25.0°Taking upward direction as positive for block M1 and downwards as positive for block M2.
Therefore, we can write the following equation of motion for the two blocks:
For M2: m2g - T = m2a ...(1)
For M1: T - m1g = m1a ...(2)
We can see from the figure that M2 is on an inclined plane making an angle θ with the horizontal.
We can resolve the weight of M2 into two components:
Perpendicular to the plane = m2gcosθParallel to the plane = m2gsinθ
The component parallel to the plane will tend to make the block move downwards.
Therefore, the effective weight will be:
mg = m2gsinθ ...(3)
From equation (1) we can write:
T = m2g - m2a ...(4)
Substituting equation (4) in equation (2), we get:
m2g - m2a - m1g = m1a ...(5)
On solving equation (5), we get the acceleration as:
a = g(m2sinθ - m1) / (m1 + m2)
On substituting the given values, we get:
\(a = 2.14 m/s^{2}\)
The distance moved by M2 in 2 seconds can be found out using the formula:\(s = ut + \frac{1}{2} at^{2}\)
Here, initial velocity, u = 0m/s Time, t = 2s Acceleration, \(a = 2.14 m/s^{2}\)
On substituting these values, we get the distance travelled by M2 as: s = 4.27 m
Therefore, the acceleration of the two blocks is \(2.14 m/s^{2}\). And the distance does block M2 move in 2.00 s is 4.27 m.
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why we get electric shock when we get up from bed and suddenly touch refrigerator?
Answers
Answer:
because current pass directly
Explanation:
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An object changing its speed from 10m/s to 3m/s is
Speeding up
Slowing Down
Going at a constant speed
Not moving
Answers
B. Slowing Down.