You are driving at 22.0 m/s when you suddenly slam on the brakes to avoid a collision. You come to a complete stop. When you stop, your acceleration
is determined by your tires and the road conditions, and it is a constant -9.60 m/s^2. The skid marks you leave behind can be measured to determine your displacement. How long will our skid marks be?
Answers
Please find attached photograph for your answer.
The skid mark will be 25.21 m long.
From the question given above, the following data were obtained:
Initial velocity (u) = 22.0 m/s
Final velocity (v) = 0 m/s
Deceleration (a) = –9.6 m/s²
Displacement (s) =?The displacement can be obtained as follow:
v² = u² + 2as0² = 22² + (2 × –9.6 × s)
0 = 484 – 19.2a
Collect like terms0 – 484 = –19.2s
–484 = –19.2s
Divide both side by –19.2\(s = \frac{-484}{-19.2} \\\\\)
s = 25.21 mTherefore, the skid mark is 25.21 m long
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Related Questions
prepare a report on why a vehicle needs to be maintained/serviced after a certain period of time. How is servicing different in a petrol/diesel and electric vehicle?
Answers
Vehicles need to be serviced for several reasons such as preventing costly repairs and improving fuel economy.
Why should cars be maintained and / or serviced ?First, regular maintenance can help to prevent costly repairs down the road. Second, maintenance can help to improve fuel economy and emissions. Third, maintenance can help to keep your vehicle safe and reliable.
The servicing requirements for petrol/diesel and electric vehicles differ in a number of ways. Petrol/diesel vehicles require oil changes more frequently than electric vehicles. This is because petrol/diesel engines use oil to lubricate the moving parts, while electric motors do not. Petrol/diesel vehicles also require tune-ups more frequently than electric vehicles.
This is because petrol/diesel engines have more moving parts that need to be synchronized, while electric motors have fewer moving parts.
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A sea otter swims toward an inlet with a speed of 5.0 m/s as a current of1.0 m/s flows in the opposite direction. How long will it take the sea otterto swim 100. m?*
Answers
Given:
The speed of sea otter is
\(v_s=5\text{ m/s}\)The speed of the current is
\(v_c=\text{ 1 m/s}\)in the opposite direction.
The distance is d = 100 m
To find the time taken by sea otter to cover a distance d = 100 m.
Explanation:
The total speed of sea otter is
\(\begin{gathered} v_=v_s-v_c \\ =5-1 \\ =4\text{ m/s} \end{gathered}\)The time taken will be
\(\begin{gathered} t=\frac{d}{v} \\ =\frac{100\text{ m}}{4\text{ m/s}} \\ =25\text{ s} \end{gathered}\)Thus, the time taken is 25 s to swim 100 m.
explain why a wrecking ball can destroy a building, but a yo-yo cant. Use the term kinetic energy in your explanation.
Answers
momentum increases as force increases.
momentum= mass x velocity
the wrecking ball has a bigger mass and weight.
the mass of the weight of the wrecking ball is constant, the velocity of the weight as it swings must be increased if momentum is going to be increased.
The kinetic energy of a body determines it's level of impact on the object in which it comes in contact with. Hence, the much larger kinetic energy exhibited by a wrecking ball compared to a yo-yo means that is has a much larger impact on a building than a yo-yo.
Kinetic Energy = 0.5mv²The kinetic energy of a body is a factor of it's velocity and mass as they are directly proportional.
The wrecking ball has a very large mass which is thousands of times larger than that of a yo-yo. Also, the velocity at which a wrecking ball is launched is higher than the velocity of a yo-yo.
This means that the kinetic energy of a wrecking ball is much higher than that of yo-yo. Hence, having much greater impact on a building compared to a yo-yo.
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How to determine whether a compound is ionic or covalent
Answers
2.If a compound is made from two non-metals, its bonding will be covalent.
give pressure loss Darcy weisbach equation
Answers
Answer:
Multiply the friction factor by pipe length and divide by pipe diameter. Multiply this product by the square of velocity. Divide the answer by 2.
Explanation:
Multiply the friction factor by pipe length and divide by pipe diameter. Multiply this product with the square of velocity. Divide the answer by 2.
Hope this answer helps you
Object 1 with mass 1=3.25 kg
is held in place on an inclined plane that makes an angle
of 40.0∘
with the horizontal. The coefficient of kinetic friction between the plane and the object is 0.535.
Object 2 with mass 2=4.75 kg
is connected to object 1 with a massless string over a massless, frictionless pulley. The objects are then released.
Calculate the magnitude
of the initial acceleration.
Calculate the magnitude
of the tension in the string once the objects are released.
Answers
The magnitude of the initial acceleration of the object is 4.2 m/s².
The tension in the string once the object starts moving is 13.65 N.
What is the magnitude of the initial acceleration?The magnitude of the initial acceleration of the object is calculated by applying Newton's second law of motion as follows;
F(net) = ma
m₂g - μm₁g cosθ = a(m₁ + m₂)
where;
m₁ and m₂ are the masses of the blocksg is acceleration due to gravityμ is coefficient of frictionθ is the angle of inclinationa is the acceleration(4.75 x 9.8) - (0.535 x 3.25 x 9.8 x cos40) = a(3.25 + 4.75)
33.5 = 8a
a = 33.5/8
a = 4.2 m/s²
The tension in the string once the object starts moving is calculated as;
T = m₁a
T = 3.25 x 4.2
T = 13.65 N
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A battery is placed in a flashlight which complet e a circuit then produce light when it turns to the own position
Answers
Answer:
Chemical—> electrical—> radiant
Explanation:
i have know idea if this isn't correct I have no idea
A figure skater glides along a circular path of radius 3.93 m. (a) If she coasts around one half of the circle, find the magnitude of the displacement vector. (b) If she coasts around one half of the circle, find what distance she skated. (c) What is the magnitude of the displacement if she skates all the way around the circle?
Answers
The magnitude of the displacement vector refers to the length or amount of the displacement vector. Displacement is the change in position of an object. Displacement is a vector quantity, which means it has both magnitude and direction. In this question, a figure skater is gliding along a circular path of radius 3.93 m.
If she coasts around one half of the circle, we have to find the magnitude of the displacement vector. The figure skater is gliding along a circular path of radius 3.93 m. If she coasts around one half of the circle, then her final and initial position is on the same point. Therefore, the magnitude of the displacement vector is zero. Distance Skated Distance refers to the length covered by an object or an individual. In this question, the figure skater is gliding along a circular path of radius 3.93 m. If she coasts around one half of the circle, we have to find what distance she skated. The distance covered by an object or individual is determined by the formula:Distance = Circumference/2Given that the radius of the circle is 3.93 m, then:Circumference of the circle = 2πr= 2 × 3.14 × 3.93= 24.7 m.Therefore, the distance covered by the figure skater around half of the circle = 24.7 m/2 = 12.35 m. Therefore, she skated 12.35 m.Magnitude of DisplacementIf the figure skater skates all the way around the circle, then she covers the entire circumference of the circle. Therefore, the magnitude of the displacement vector is the same as the circumference of the circle, which is given as:Circumference of the circle = 2πr= 2 × 3.14 × 3.93= 24.7 mTherefore, the magnitude of the displacement vector when the figure skater skates all the way around the circle is 24.7 m.For such more question on magnitude
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"Index of refraction is defined as the speed of light in a vacuum divided by the speed of light in the medium. What is the index of refraction for a glass sample
Answers
Complete Question
Index of refraction is defined as the speed of light in a vacuum divided by the speed of light in the medium. What is the index of refraction for a glass sample? Speed of light in a vacuum c = 3.0 x 108 m/s. Speed of light in the glass = 1.50 x 108 m/s.
Answer:
The index of refraction is \(n_g = 2\)
Explanation:
From the question we are told that
The speed of light in a vacuum is \(c = 3.0 *10^{8} \ m/s\)
The speed of the in the glass is \(c_g = 1.50 *10^{8} \ m/s\)
From the question the index of refraction for a glass is mathematically evaluated as
\(n_g = \frac{c}{c_g }\)
\(n_g = \frac{3.0 *10^{8}}{1.50 *10^{8} }\)
\(n_g = 2\)
which image is observe by seeing a distant thing using magnifying glass?
A) Small - reverse. B) Small - straight
C) Big - reverse. D) Big - straight
Answers
Answer:
1/f = 1/o + 1 /i thin lens equation
1 / i = 1/f - 1/o = (o - f) / (o f) rearranging
or i = o f / (o - f) for the image distance
This image will be positive (real) with values given
m = -i / o magnification
m = - f / (o - f) shows m is negative and the image inverted
Also, since o here is large m will be small and the image is small
I think they mean A as the right answer
Different texts use different terms but here i is image distance and o the object distance
Answer: D) Big - straight
Brainliest pls if correct!An object starts from rest and accelerates uniformly. If it moves 2.00m during the first second, then, during the first 5.00 seconds, it will move:________.
a. 7.00 mm .
b. 10.0 mm .
c. 25.0 mm .
d. 50.0 mm .
Answers
Answer:
The correct option 50.0 m (the units of the answers are wrong, they should be in meters and not in millimeters).
Explanation:
From the first second we can find the acceleration of the object:
\( X_{f} = X_{0} + V_{0}t + \frac{1}{2}at^{2} \)
Where:
\(X_{f}\): is the final position = 2.00 m
\(X_{0}\): is the initial position = 0
\(V_{0}\): is the initial speed = 0 (starts from rest)
t: is the time = 1 s
The acceleration is:
\( a = \frac{2X_{f}}{t^{2}} = \frac{4.00 m}{(1 s)^{2}} = 4.00 m/s^{2} \)
Now, we can find the distance after 5 seconds:
\(X_{f} = X_{0} + V_{0}t + \frac{1}{2}at^{2} = \frac{1}{2}*4.00 m/s^{2}*(5 s)^{2} = 50.0 m\)
Therefore, the correct answer is 50.0 m. All the options have the units in millimeters and not in meters hence, the units of the options are wrong.
I hope it helps you!
The final position of the object after 5 seconds is 50 m.
Option D is the correct answer.
How do you calculate the distance covered by the object in 5 seconds?Given that the object starts from rest and accelerates uniformly. It moves 2.00m during the first second.
Let us consider that the initial velocity is v and the initial position is x and the final position is x' for time interval t.
Hence for the given condition, t = 1 s, x' = 2 m, v = 0 m/s and x = 0 m. The acceleration can be calculated as given below.
\(a = \dfrac {2x'}{t^2}\)
\(a = \dfrac {2\times 2}{1}\)
\(a = 4 \;\rm m/s^2\)
The final position of the object after 5 seconds is given below.
\(x (\rm final) = x + vt + \dfrac {1}{2}at^2\)
Substituting the values in the above equation.
\(x(\rm final) = 0 + 0 + \dfrac {1}{2}\times 4 \times 5^2\)
\(x (\rm final) = 50 \;\rm m\)
Hence we can conclude that the final position of the object after 5 seconds is 50 m. Option D is the correct answer.
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Which statement is true
Cells usually take in large food molecules
Cells can get energy by breaking down molecules from food
Cells use energy to help an organism grow and live
Breaking down molecules does not release energy
Answers
Cells usually take in large food molecules. In order to get the nutrients and energy they need, cells have to take in large molecules like carbohydrates, proteins, and fats. These molecules are too big to pass through the cell membrane, so cells have to use specialized structures like lysosomes and vacuoles to break them down into smaller molecules.
Cells can get energy by breaking down molecules from food. When cells break down molecules from food, they release energy in the form of ATP (adenosine triphosphate). This energy can be used by the cell to power its functions, such as growth and metabolism.
Cells use energy to help an organism grow and live. The energy that cells get from
breaking down molecules from food is essential for maintaining the functions of the organism. Without this energy, cells would not be able to perform essential tasks like building new tissue, repairing damaged cells, and fighting off infections.
Breaking down molecules does not release energy.
Breaking down molecules actually requires energy, not releases it. In order to break down large molecules into smaller ones, cells have to use enzymes and other specialized structures. These processes require energy in the form of ATP, which is why cells need to take in energy from food in the first place.
How many times larger is the United States water consumption PER PERSON compared to the World water consumption PER PERSON?
Answers
The number of times times larger is the United States water consumption PER PERSON compared to the World water consumption PER PERSON is 100 to 175 gallons of water
How does the United States' use of water compare to that of other countries?Every day, the average American uses 100 to 175 gallons of water. We use almost 4 trillion cubic meters of freshwater annually on a global scale! In some areas, agriculture can use up to 90% of the available freshwater.
Although the water resources in the United States are enormous, they are not limitless. Given that the average American's water footprint, or the total amount of water consumed directly and indirectly, is about twice that of the rest of the world, it is extremely important to save and safeguard this water.
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whem completing an emergency Roaside stop,it is necessary to put on your parking brake
A. True
B. False
Answers
Answer:
trueeeeeeee..........mmmm...........
A 1200 W floor heater, a 360 W television, and a hand iron operating at 900 W are all plugged into the same 120 volt circuit in a house (that is, the same pair of wires that come from the basement fuse box). What is the total current flowing through this circuit?
20.5 A*
17.5 A
15 A
12.5 A
Answers
Current= (1200+360+900)/ 120
Current= 20.5 A
Hope this helps :)
what kind of weather would u assosiate with higher perssure system? How does the density, humidity and air motion compare to that of low pressure system?
Answers
Answer:
Low pressure systems typically arrive with storms and clouds. Air motion is usually upwards, as heated are is less dense and more buoyant than cooler air. A high pressure system is typically cooler than its counter-part, and skies are usually clear. Low pressure systems carry more water vapor due to rising hot air cooling and condensing.
Clothes dryer spins to angular speed 7.2 rad/s starting from angular speed 0 rad/s
Average angular acceleration is 1.88rad/s^2
Takes dryer 3.82 s to reach 7.2 rad/s
How many revolutions does the dryer make during this time
Answers
Answer:
Explanation:
initial angular speed ω₀ = 0
final angular speed = ω
time = t
angular acceleration α = 1.88 rad /s ² , θ = angle of rotation in radian
ω² = ω₀² +2 α θ
7.2² = 0 + 2 x 1.88 x θ
θ = 13.79 rad
let n be no of rotation
2πn = 13.79
2 x 3.14 x n = 13.79
n = 2.2
The largest flowers in the world are the Rafflesia Arnoldii, found in Malaysia. A single flower is almost a meter across and has a mass up to 11.0 kg. Suppose you cut off a single flower and drag it along the flat ground. If the coefficient of kinetic friction between the flower and the ground is 0.39, what is the magnitude of the frictional force that must be overcome?
Answers
The magnitude of the frictional force that must be overcome is 42.04 N.
What is the magnitude of the frictional force?
The magnitude of the frictional force that must be overcome is calculated by applying Newton's second law of motion as follows;
Mathematically, the formula for the frictional force is given as;
F = μmg
where;
μ is the coefficient of frictionm is the mass of the flowerg is acceleration due to gravityThe magnitude of the frictional force that must be overcome is calculated as;
F = 0.39 x 11 kg x 9.8 m/s²
F = 42.04 N
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PLEASE HELP QUICK
Engines transform the energy in fuel into mechanical energy, heat, and sound.
Why is some of the energy in fuel always transformed into heat?
A.It is possible to build an engine that runs without heating up, but it would be expensive.
B. It is not possible to build an engine that runs without heating up.
C.It is possible to build an engine that runs without heating up, but technology has not advanced enough for it yet.
D.Engines can run cold, but it damages the engine. Most engines are heated up for this reason.
Answers
Answer:
B.
Explanation:
it is impossible to make an engine work without heating up because there is friction plus I took the test
Answer:It is not possible to build an engine that runs without heating up.
Explanation:
Two planets, Dean and Sam, orbit the Sun. They each have with circular orbits, but orbit at different distances from the Sun. Dean orbits at a greater average distance than Sam. According to Kepler's Third Law, which planet will have a longer orbital period? Group of answer choices Dean Sam Since they both have circular orbits, they will have the same orbital periods. There isn't enough information to tell.
Answers
Answer:
The correct answer is Dean has a period greater than San
Explanation:
Kepler's third law is an application of Newton's second law where the force is the universal force of attraction for circular orbits, where it is obtained.
T² = (4π² / G M) r³
When applying this equation to our case, the planet with a greater orbit must have a greater period.
Consequently Dean must have a period greater than San which has the smallest orbit
The correct answer is Dean has a period greater than San
Answer:
According to the law of universal gravitation, any two objects are attracted to each other. The strength of the gravitational force depends on the masses of the objects and their distance from each other.
Many stars have planets around them. If there were no gravity attracting a planet to its star, the planet's motion would carry it away from the star. However, when this motion is balanced by the gravitational attraction to the star, the planet orbits the star.
Two solar systems each have a planet the same distance from the star. The planets have the same mass, but Planet A orbits a more massive star than Planet B.
Which of the following statements is true about the planets?
A.
Planet B will keep orbiting its star longer than Planet A.
B.
Planet A has a longer year than Planet B.
C.
Planet A orbits its star faster than Planet B.
D.
Planet B is more attracted to its star than Planet A.
Explanation:
a stunt man drops from a building and falls 15m down onto a giant air mattress a) How much time does it take for the stunt man to hit the air mattress.
B.) What is his velocity as he slams into the mattress (# and direction)
please draw a sketch also!!
Answers
The time taken is √3 s and the velocity with he lands is 17.3 m/s.
What is the time taken?In this case, we have to use the equations of kinematics as it has to do with motion under gravity. We know that;
h = ut + 1/2gt^2
h = height
u = initial velocity
g = acceleration due to gravity
t = time taken
Given that u = 0 m/s because the object was dropped from a height.
h = 1/2gt^2
t = √2h/g
t = √2 * 15/10
t = √3 s
The velocity with which he falls is obtained from;
v = u + gt
v = gt
v = 10 m/s^2 * √3 s
v = 17.3 m/s
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When attacking fire in stacked and piled materials, _____, then apply water or Class A foam until extinguished.
Select one:
a. advance until you are at least 5 feet (1.5 m) from the fire's edge
b. apply Class B foam or clean agents
c. advance until you are at least 10 feet (3 m) from the fire's edge
d. use hooks or pike poles to break apart material
Answers
The correct answer is option D, which specifies that while putting out a fire in stacked and piled materials, use hooks or pike poles to pull the materials apart prior to dousing the area.
Putting out the fire with Class A foam or water until it has fully died down. In physics, a force is a factor that has the potential to change an object's trajectory. In reaction to a force, a mass-containing object can accelerate or modify its velocity by, for instance, moving away from rest. Force can logically be described as pushing or pulling. A force has both magnitude and direction, making it a vector quantity. Using the SI system, it is written as a newton (N). There is material in all things.
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Correct answer:- (d) use hooks or pike poles to break apart material.
When attacking the fire in stacked and piled materials, use hooks or pike poles to break apart material, then apply water or Class A foam until extinguished.
How would you put out a fire containing polar solvent fuels if you were using foam?A mixture of artificial stabilizers, foaming agents, fluorochemicals, and synthetic polymers are used to create alcohol-resistant (AR) foam, which is intended for use with polar solvents. These foams are resistant to being destroyed by polar solvents due to their chemical composition.
What kind of foam is utilized to put out fires caused by flammable and combustible liquids?The very effective foam known as aqueous film-forming foam (AFFF, or alcohol-resistant AR-AFFF) is used to put out high-hazard liquid fires.
What is the main substance applied to put out a Class A fire?Class A: Consists of common combustibles like rubber, paper, wood, and plastic. Pressurized water, foam, or multipurpose dry chemicals are the most often used extinguishing agents.
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Swim 2km at 3km/h. Run at 12km/h for 1 ½ hours. Cycling 55km at 30 km/h. What is the mean overall speed.
Answers
Answer:
t1 = S1 / V1 = 2 km / 3 km/hr = 2/3 hr where S1 = 2 km
S2 = 12 km/hr * 3/2 hr = 18 km where t2 = 3/2 hr
t3 = S3 / V3 = 55 km / 30 km/hr = 11/6 hr where S3 = 55 km
T = t1 + t2 + t3 = 4/6 + 9/6 + 11 / 6 = 24/6 = 4 hrs
S = S1 + S2 + S3 = 2 + 18 + 55 = 75 km
V = S / T = 75 km / 4 hrs = 18.75 km/hr for the average speed
An 82kg male and 48kg female pari figure starting team are gliding across the ice of 7.4m/s preparing for a throw jump maneuver. The male starter tosses the female starter forward with a speed of 8.6n/s. Determine the speed of the male starter immediately after the throw.
Answers
Answer:
Explanation:
(m1 + m2)*V1 = m2*V2 + m1*Vx
Vx = ((m1 + m2)*V1 - m2*V2) / m1
Vx = ((82 + 48)*7.4 - 48*8.6) /82 = 6.7 m/s
The equipment shown below can be used to carry out which process?
Answers
The equipment shown below can be used to carry out the electrolysis process.
What do you mean by an electrolysis ?The term electrolysis is defined as a process of decomposing ionic compounds into their elements by moving a direct electric current direct the compound in a fluid form.
An example of an electrolysis process is between an impure copper anode and a pure copper cathode in a temperature-controlled, quiet solution of copper sulfate with a constant current source linking the two electrodes.
Thus, The equipment shown below can be used to carry out the electrolysis process.
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Your question is incomplete, missing image is attached below:
The equipment shown below can be used to carry out which process?
why what is derived unit justify
Answers
Answer:
All other SI units are derived by multiplying, dividing or powering the base units in various combinations, For example: mechanical work is force applied multiplied by distance moved and has the unit newton metre written as Nm.
Explanation:
please mark me as the brainliest
a question was asked by a teacher to a student. She gave the student a jumbled word and told him to make words out of it. The jumbled word is gzeysktqix. Now you know what to do. see ya!
Answers
When the teacher asked the student to make words out of the jumbled word gzeysktqix, the student was being tested on his ability to unscramble words. Unscrambling words is the process of taking a word or series of letters that are out of order and rearranging them to form a word that makes sense.
When trying to unscramble a word, it is important to look for any patterns that can help identify smaller words within the jumbled letters. This can help make the process easier and quicker. For example, in the jumbled word gzeysktqix, one might notice that the letters "sktqix" appear together.
This could indicate that these letters could potentially form a word. By looking at the remaining letters, one could notice that the letters "g", "z", "e", and "y" could also form smaller words. After some rearranging, the letters can be unscrambled to form the words "sky", "zig", "sex", and "yet". These are just a few examples, as there are likely many other words that can be formed from this jumbled word.
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Three resistors of 4.0, 6.0, and 10.0 Ω are connected in parallel. If the combination is connected in series with a 12.0-V battery and a 2.0-Ω resistor, what is the current through the 10.0-Ω resistor? Group of answer choices
Answers
Answer:
0.536 A
Explanation:
From the question,
The combined resistance of the parallel connection is given as
1/Rt = 1/4+1/6+1/10
Rt = 120/15
Rt = 8 ohms.
Since the the combination is connected in series with a 10 ohms resistor,
Rt' = 8+10 = 18 ohms.
Current flowing through the series circuit
I = V/Rt'
V = 12 V, Rt' = 18 ohms
I = 12/18
I = 0.67 A.
Therefore voltage across the combined resistor
V' = 8(0.67)
v' = 5.36 V.
Since the resistors a connected in parallel, the same voltage drop across them.
Therefore, current through the 10 ohms
Ix = 5.36/10
Ix = 0.536 A
2. Why are numbers better than words in a science experiment?
Answers
Why words are more important than numbers: ... Words on the other hand are harder to manipulate, they also tell you why someone voted a particular way and to improve your delivery and thus your customer satisfaction you need to understand the why's...
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the electrostatic force between two objects is 40N. if the charge of one object is cut in half, and the distance is doubled, what is the new force?
Answers
Answer:
F1 = K Q1 Q2 / R1^2
F2 = K Q1 / 2 * Q2 / (2 R1)^2
F2 / F1 = 1/2 / 4 = 1/8
The new force is 5N (1/2 due to charge and 1/4 due to distance)