The 243000-lb space-shuttle orbiter touches down at about 236 mi/hr. The drag chute is deployed at 189 mi/hr, the wheel brakes are applied at 101 mi/hr until wheelstop, and the drag chute is jettisoned at 35 mi/hr. If the drag chute results in a deceleration of -0.000200v2 (in feet per second squared when the speed v is in feet per second) and the wheel brakes cause a constant deceleration of 3.5 ft/sec2, determine the distance s traveled from 189 mi/hr to wheelstop.
Answers
Answer:
5156.37 ft
Explanation:
Given data:
weight ( W ) = 243,000 Ib
Motion of shuttle ; from 189 mi/hr to 101 mi/hr
dv/dt = -0.0002 V^2
I/v * dv/dt = -0.0002 ds
Convert mi/hr to ft/s ( 1 mi/hr = 1.467 ft/s)
189 mi/hr = 277.263 ft/s
101 mi/hr = 148.167 ft/s
After Integrating
In ( 148.167 / 277.263 ) = -0.0002 ( S1 - S2 )
S1 - S2 = -0.627 / -0.0002
S1 - S2 = 3135 ft/s
Now from 101 mi/hr to 35 mi/hr
dv/dt = ( - 0.0002 V^2 + 3.5 )
ds = V*dv / ( -0.0002 v^2 - 3.5 )
given : 35 mi/hr = 51.345 ft/s
101 mi/hr = 148.167 ft/s
Integrate
S3 - S2 = - In( 0.0002 v^2 + 3.5 ) / 0.0002 * 2 ]
= 1644.75 ft/s
S4 - S3 = 376.62 ft/s
attached below is the remaining part of the solution
Total distance travelled = 3135 + 1644.75 + 376.62 = 5156.37 ft
Related Questions
zero electric field is zero between two similar charges
Answers
The statement "Electric field is zero between two similar charges" is false because when two identical charges come close to each other, an electric field is created between them which does not satisfy the above-mentioned comment.
The electric field is a vector quantity that describes the force experienced by a positive test charge set up in close proximity to the charges. When two charges are similar, such as two positive charges or two negative charges, the electric field lines emerge from one charge and terminate on the other. The electric field lines demonstrate the direction in which a charge that is positive would experience a force if positioned at any point in the electric field. The electric field between both charges is directed away from one charge and toward the other, forming a field pattern.
Therefore, the electric field is not zero between two similar charges, but rather exists and has a specific direction determined by the charges' polarity.
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The question is-
The electric field is zero between two similar charges. True/false. Give reasons for your answer.
A motorcycle stoop is at a traffic light, when the light turns green, the motorcycle accelerates to a speed of 78 km/h over a distance of 50 m. What is the average acceleration of the motorcycle over this distance?
Answers
The average acceleration of the motorcycle over the given distance is approximately 9.39 m/s².
To calculate the average acceleration of the motorcycle, we can use the formula:
Average acceleration = (final velocity - initial velocity) / time
First, let's convert the final velocity from km/h to m/s since the distance is given in meters. We know that 1 km/h is equal to 0.2778 m/s.
Converting the final velocity:
Final velocity = 78 km/h * 0.2778 m/s = 21.67 m/s
Since the motorcycle starts from rest (initial velocity is zero), the formula becomes:
Average acceleration = (21.67 m/s - 0 m/s) / time
To find the time taken to reach this velocity, we need to use the formula for average speed:
Average speed = total distance/time
Rearranging the formula:
time = total distance / average speed
Plugging in the values:
time = 50 m / 21.67 m/s ≈ 2.31 seconds
Now we can calculate the average acceleration:
Average acceleration = (21.67 m/s - 0 m/s) / 2.31 s ≈ 9.39 m/s²
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a 250.0 g snowball of radius 4.00 cm starts from rest at the top of the peak of a roof and rolls down a section angled at 30.0 degrees
Answers
Answer:
The response to this question is as follows:
Explanation:
The whole question and answer can be identified in the file attached, please find it.
The force diagram of all the forces acting on the snowball include the normal force acting upwards, the weight of the snowball acting downwards and the frictional force acting horizontal.
The given parameters;
mass of the snow ball, m = 250 gradius of the snow ball, r = 4 cmangle of inclination of the plane, θ = 30 ⁰The force diagram of all the forces acting on the snowball is calculated as follows;
↑ N
⊕ → F
↓ W
Where;
N is the normal force on the snowballF is the frictional force on the snowballW is the weight of the ballThus, the force diagram of all the forces acting on the snowball include the normal force acting upwards, the weight of the snowball acting downwards and the frictional force acting horizontal.
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A toy car rolls down the ramp covering 4 meters in 6 seconds. What is its speed?
Show work here:
Answers
Answer:
0.67m/s
Explanation:
Given parameters:
Distance = 4m
Time taken = 6s
Unknown:
Speed = ?
Solution:
Speed is the distance covered per unit of time.
It is mathematically expressed as;
Speed = \(\frac{distance}{time}\)
Speed = \(\frac{4}{6}\) = 0.67m/s
Mathias is going to do some informational interviewing. What is one of the main benefits of doing these interviews?
O A.
OB.
O C.
O D.
A.He will gain insight about a new career opportunity.
B.He will likely be offered a position with a company.
C.He will be able to ask questions about job openings.
D.He will find out how much money everyone earns.
Answers
Answer:
A
Explanation:
One of the main benefits of informational interviewing is that it allows the person conducting the interviews to gain insights and information about a particular career or industry.
what did the biologist wear on his first date ?
Answers
Answer:
Calvin Cycles
Explanation:
This is a popular joke. Is this an answer choice for your question?
Two friends challenge each other to a race up a flight of stairs (h=4.0m) Joe, who has a mass of 150kg, makes the climb in 8.0s while mike, 120kg took 5.0s to make the climb. Use g=10m/s^2
A.) Explain why joe did more work than mike.
B.) Explain why mike was more powerful than joe.
PLEASE HELP!!!
Answers
Answer:A
Explanation: i think
What exactly is kinetic energy? Explain in a summary as I am new
Answers
To find:
What is kinetic energy?
Explanation:
The kinetic energy of an object is the energy possessed due to the motion of the object. The kinetic energy of an object is directly proportional to the square of the velocity of the object.
The kinetic energy of an object is given by,
\(KE=\frac{1}{2}mv^2\)Where m is the mass of the object and v is the velocity of the object.
The kinetic energy can also be defined as the work done on the object to accelerate it.
Final answer:
The kinetic energy is the energy possessed by the object due to its motion or it is the work done on the object to accelerate it.
17. Which of the following supports the idea that the genetic code is common to all living
things?
A. All living things share similar modes of reproduction
B. The same adaptations help all living things survive in the same way.
C. All living things have identical ways of using energy for survival.
D. All living things contain DNA with the same nitrogenous bases.
Answers
Answer:
Explanation:
genetic code us a keyword
different organisms have diff ways in reproducting
different ways of adapting to environments, obtianing energy, etc. It's mainly asking what makes all living things have something in common, like ALL all
A girl of weight 500 N runs up a flight of stairs in 10 seconds. The vertical height of the stairs is 5m. what is the average power developed by a girl
Answers
The power that have been developed is 250 W.
What is the power developed?We have to note that when we talk about the power we mean the rate at which work can be done as such we can be able to say that the power is the timed rate of doing work in the context that we have in this question here.
We have to know that the power is the rate at which the work is done thus;
Work done = Force * distance = 500 N * 5 m = 2500 J
Power developed = Work done /Time
= 2500J/10 s
= 250 W
This is the power that is developed.
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The average power developed by the girl is 250 W.
What is power?In physics, power is described as the amount of energy transferred or converted per unit time.
We know that Power = Work done / Time taken
and
Work done = Force x Distance x cos(theta)
where,
Force = 500 N (weight of the girl)
Distance = 5m (vertical height of the stairs)
theta = 90 degrees (vertical direction)
Substituting the\ values in the formula, we have that
Work done = 500 x 5 x cos(90) = 2500 J (Joules)
Substituting the values of Work done and Time taken and we that
Power = 2500 J / 10 s = 250 (Watts)
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Two cars collide head-on and stick together.
Car A, with a mass of 2000 kg, was initially
moving at a velocity of 10 m/s to the east. Car
B, with an unknown mass, was initially at rest.
After the collision, both cars move together at
a velocity of 5 m/s to the west. What is the
mass of Car B?
OF
Answers
The mass of Car B is -6000 kg.
To solve this problem, we can apply the principle of conservation of momentum, which states that the total momentum before the collision is equal to the total momentum after the collision.
Therefore, we can write the equation for the conservation of momentum as:
(mass of Car A * velocity of Car A) + (mass of Car B * velocity of Car B) = (mass of Car A + mass of Car B) * velocity after collision
Let's substitute the given values into the equation:
(2000 kg * 10 m/s) + (mass of Car B * 0 m/s) = (2000 kg + mass of Car B) * (-5 m/s)
Simplifying the equation:
20000 kg*m/s = -5 m/s * (2000 kg + mass of Car B)
Dividing both sides by -5 m/s:
-4000 kg = 2000 kg + mass of Car B
Subtracting 2000 kg from both sides:
mass of Car B = -4000 kg - 2000 kg
mass of Car B = -6000 kg
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The Milky Way is our home galaxy. Which of the following are the main components of a galaxy?
A.
gravity, sedimentary rocks, and water
B.
ice, meteoroids, and minerals
C.
orbits, cores, and eclipses
D.
gas, dust, and stars
Answers
Answer:
D
Explanation:
most probable answers. I miss however here few things like eg. dark matter
What do we call the distance between the start point and the end point ?
Answers
The same amount of thermal energy was added to two equal masses of Aluminum and Iron. The specific heat of Aluminum is double the specific heat of iron. If the temperature of the Aluminum's mass changes by /\T, what is the change in the Iron's mass temperature?
Answers
Answer:
it is double the temperature change of iron
A plane is traveling at 80 m/s. To prepare for landing, itslows down at a rate of 0.25 ms squared for 120 seconds. Calculate the speed of the plane after it decelerates. I’ll give brainliest and everything to whoever gets it right please
Answers
Answer:
The speed of the plane after it decelerates is 50 m/s
Explanation:
Motion with Constant Acceleration
When an object gains or losses velocity in time, it acquires acceleration. If this value is constant, we can calculate the final velocity (or speed in scalar terms) as:
\(v_f=v_o+at\)
Where vf is the final speed, vo is the initial speed, a is the constant acceleration, and t is the time the acceleration is acting.
The plane is originally traveling at vo=80 m/s and it slows down at a constant rate of \(a=-0.25\ m/s^2\) during t=120 seconds. Note we have added the negative sign to the acceleration because the plane is slowing down, i.e., the acceleration is against the speed.
Thus, the final speed is:
\(v_f=80-0.25*120\)
\(v_f=80-30=50\)
\(v_f = 50\ m/s\)
The speed of the plane after it decelerates is 50 m/s
calculate the power of a 100kg man who jumps of a building 10m high in 10 seconds given that acceleration due to gravity is 10 ms–²
Answers
A 100kg man jumping off a 10m high building in 10 seconds has a power of 1000 Watts.
When the man jumps off the building, he initially possesses potential energy due to his position above the ground. As he falls, this potential energy is converted into kinetic energy, which is the energy of motion. The work done by the man is equal to the change in potential energy.
The potential energy (PE) can be calculated using the formula PE = mgh, where m represents the mass, g represents the acceleration due to gravity, and h represents the height. In this case, the mass is given as 100kg, the acceleration due to gravity is 10 m/s², and the height is 10m.
Substituting these values into the formula, we get PE = 100kg * 10m/s² * 10m = 10,000 Joules. This means that the work done by the man while jumping off the building is 10,000 Joules.
Power is defined as the rate at which work is done. In this scenario, we divide the work (10,000 Joules) by the time taken (10 seconds) to obtain the power. Therefore, Power = Work/Time = 10,000 J / 10 s = 1000 Watts.
Hence, the power of the 100kg man who jumps off the 10m high building in 10 seconds is calculated to be 1000 Watts. Power represents the rate at which energy is transferred or work is done, indicating how quickly the man transformed potential energy into kinetic energy during the jump.
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the distance covered by a car at a time t is given by x = 20t + 6t^2 . calculate the instantaneous velocity and acceleration when t = 1s
Answers
The velocity is 22 m/s while the acceleration is 12 m/s^2.
What is the instantaneous velocity?We know that the velocity can be obtained from the equation that have been given for the distance that is covered. We know that we have been given the distance that is covered as; x = 20t + 6t^2
Then we know that;
Velocity = dx/dt = 20 + 12t
Velocity = 20 + 12(1) = 22 m/s
The acceleration can be obtained from;
Acceleration = d^2x/dt^2 = 12 m/s^2
Thus we have used the equation to obtain the velocity and the acceleration.
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How are insulators and conductors different?
a Insulators cause electricity to heat up, and conductors cause electricity to cool.
b Conductors allow the flow of electricity, and insulators block the flow.
c Conductors slow electricity down, and insulators speed it up.
d Insulators allow the flow of electricity, and conductors block the flow.
Answers
I don’t know
An organ pipe of length L has one end closed but the other end open. What is the wavelength of the fundamental node emitted?
a. Slightly smaller than 4 L
b. Slightly larger than 4 L c. Roughly equal to 3/2
d. Slightly larger than 2 L
Answers
Answer:analize a afirmacao a seguir e tudo que envolve o gerenciamento da marca e que ultrapassa as acoes com objetivos economicos e refere se a cultura principios e valores
Explanation:
A stereo speaker produces a pure "A" tone, with a frequency of 220.0 Hz.
What is the period of the sound wave produced by the speaker?
T=
What is the wavelength water of the same sound wave as it enters some water, where it has a speed of about 1480 m/s?
λwater=
What is the wavelength air of this sound wave as it travels through air with a speed of about 341 m/s?
λair=
Answers
(a) The period of the sound wave is 0.005 s.
(b) The wavelength of the wave when the speed of the wave is 1480 m/s is 6.73 m.
(c) The wavelength of the sound wave as it travels through air is 1.55 m.
The given parameters;
Frequency of the wave, F = 220 HzThe period of the sound wave is calculated as follows;
\(T = \frac{1}{f} \\\\T = \frac{1}{220} \\\\T = 0.005 \ s\)
The wavelength of the wave when the speed of the wave is 1480 m/s is calculated as follows;
\(v = f\lambda \\\\\lambda = \frac{v}{f} \\\\\lambda = \frac{1480}{220} \\\\\lambda = 6.73 \ m\)
The wavelength of the sound wave as it travels through air with a speed of about 341 m/s;
\(\lambda = \frac{v}{f} \\\\\lambda = \frac{341}{220} \\\\\lambda = 1.55 \ m\)
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Calculate the average power required to lift a 750 N object a vertical distance of 10 meters in 4.0 seconds.
Answers
Answer:
500
Explanation:
What is the momentum of a 8850 kg medium truck that is traveling with a velocity of 55 m/s west on the highway
Answers
Answer:
486,750 kg*m/s
Explanation:
Momentum is mass*velocity
M = m*v
M = 8850kg*55m/s
M = 486,750 kg*m/s
The momentum of an 8850 kg medium truck that is traveling with a velocity of 55 m/s west on the highway is 486750 kg m / s.
What is momentum?Momentum is the result of a particle's mass and velocity. Being a vector quantity, momentum possesses both magnitude and direction. According to Isaac Newton's second equation of motion, the force acting on the particle equals the time rate of change of momentum.
According to Newton's second law, if a particle is subjected to a constant force for a specific amount of time, the result of the force and time (referred to as the impulse) is equal to the change in momentum.
Given:
The mass of the truck is, m = 8850 kg,
The velocity of the truck is, v = 55 m/s,
Calculate the momentum of the truck as shown below,
Momentum = m × v
Momentum = 8850 × 55
Momentum = 486750 kg m / s
Thus, the Momentum of the truck is 486750 kg m / s.
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The two objects shown in the beakers below are exactly the same size (same volume). Given liquid in the beakers is water (density = 1 g/mL), what is the density of the floating object?
A. 0,5g/cm^3
B. 0,6g/cm^3
C. 1g/cm^3
D. 6g/cm^3
Answers
Answer:
b.
Explanation:
Answer:
A. 0.5 g/cm3
Explanation:
Density is calculated by dividing an object's mass by its volume. The mass of the floating object is equal to the mass of the water it displaces. The volume of the water displaced by the floating object is 6 mL. Because water has a density of 1 g/mL, the mass of 6 mL of water is 6 g. Therefore, the mass of the floating object is 6 g.
The volume of the sunken object is equal to the volume of water that it displaces, which is 12 mL or 12 cm3. Because the two objects are the same size, the volume of the floating object is also 12 cm3. With both the mass and the volume of the floating object known, its density can be calculated as shown: density=massvolume=6g12cm3=0.5gcm3
The density of the floating object can also be estimated by observing how high it floats in the water. The percentage of the object that is underwater is equal to the density of the floating object. In this case, half of the object is underwater, so its density is about 0.5 g/cm3.
If 12 photovoltaic cells at 0.5 V each produce a total of 6 V of potential energy and carry a 1 A current to your phone, what are the power output of these cells and the resistance inside your phone? P = VI and R = V/I (Show calculations and units)
Answers
The power output of the cells is 6 watts and the resistance inside the phone is 6 Ohms.
What is power output?Power Output can be defined as the average rate of electric energy delivery in a circuit.
The S.I unit of power is Watts (W)
Resistance can be defined as the opposition to the flow of electric current caused by a substance.
The S.I unit of resistance is Ohm, denoted with the symbol (Ω)
How to calculate the power output and resistanceUsing the formula given;
Power output, P = VI
where V = voltage = 0.5 × 12 V = 6V
I = current = 1 A
Power output = 6 × 1 = 6 Watts
Resistance = V ÷ I = 6 ÷ 1 = 6 Ohms
Therefore, the power output of the cells is 6 watts and the resistance inside the phone is 6 Ohms.
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A student in gym class swings from a rope and they are moving 5 m/s at the bottom of their swing. What is the height they reach above the floor before swinging back down?
1/2v^2=gh g = 9.8 m/s^2
A 2.55 m
B. 1.28 m
c. 5m
D. 12.5 m
Answers
Answer:
A
Explanation:
Krypton-85 has a half-life of 10.76 years. It decays into rubidium-85. Suppose
a sample contains 4 atoms of krypton-85 and 12 atoms of rubidium-85.
About how old is the sample?
A. 10.76 years
B. 21.52 years
C. 43.04 years
D. 32.28 years
Answers
Answer:
21.52
Explanation:
The sample contains 4 atoms of krypton-85 and 12 atoms of rubidium-85 is 21.52 years
Krypton-85 is a radioactive gas found in small quantities in the atmosphere. It is naturally produced when stable Krypton-84 reacts with the incoming cosmic rays. Almost 1 cm3 of Krypton-84 is present per cubic meter of atmosphere. Atmospheric Krypton-85 is mostly produced by volcanoes, earthquakes, nuclear power plants, and nuclear explosions.
Since the mid-1940s, much greater quantities of Krypton-85 than that found in nature have been manufactured as a byproduct of nuclear fission. When Uranium-235 or some other fissile nucleus goes through a fissile reaction, it gets split into two portions or fragments having 2 or 3 neutrons and mass numbers between 90 and 140. The fission yield of Krypton-85 is around 0.3%; i.e., approximately 3 atoms of Krypton-85 are generated per 1000 fissions. Most of the mass of Krypton-85 is converted directly to Rubidium-85 and does not go through the long-standing state of nuclear isomer.
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A car with a mass of 2,000 kg travels a distance of 400m as it moves from one stoplight to the next. At its fastest , the car travels 18m/s. What is the kinetic energy at this point ?
Answers
Answer: KE= 324,000
Explanation: I hope that this helps! -_-
Answer:
324,000
Explanation:
If a ball is thrown up at an initial speed of 40. m/s, how many seconds does it take to reach the top of its path?
Answers
Answer:
Time, t = 4.08 secs
Explanation:
Given the following data;
Initial velocity, U = 40m/s
To find the time, we would use the first equation of motion;
\( V = U + at\)
Where;
V is the final velocity. U is the initial velocity. a is the acceleration. t is the time measured in seconds.Making time, t the subject of formula, we have;
\( t = \frac{V - U}{a}\)
We know that acceleration due to gravity, g is 9.8m/s².
a = g = - 9.8m/s² because the ball is thrown in the opposite direction.
Also, the final velocity is equal to zero (0) because the ball reached its maximum height.
Substituting into the equation, we have;
\( t = \frac{0 - 40}{-9.8}\)
\( t = \frac{-40}{-9.8}\)
Time, t = 4.08 secs
Therefore, it will take the ball 4.08 seconds to reach the top.
The block slides down an inclined friction-less track to a infinite hill that the block begins to climb and slow down. Is energy conserved or not?
Answers
Answer:
Energy is conserved.
Explanation:
Without friction, kinetic energy and gravity potential energy are always swapping back and forth.
The block slides down an inclined friction-less track to a infinite hill that the block begins to climb and slow down, in which the energy is conserved.
What is friction?Friction refers to the force that prevents hard surface, fluid layers, as well as material elements from sliding against each other.
There are various kinds of friction: Dry friction is the force that opposes the relative lateral motion of two in contact solid surfaces.
It is thought to be caused by the interactions of tiny bumps on surfaces rubbing against one another.
The bumps on each surface bend and exert force on one another, making it difficult for the surfaces to slide over one another.
A block's speed increases while its acceleration remains constant as it slides down a frictionless incline. After being placed on a ramp inclined at an angle with the horizontal, a crate remains stationary.
Thus, the block slides beneath an inclined friction-less track to an unlimited hill, where it commences to climb as well as slow down, preserving energy.
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A generator produces 60 000 J of electric energy every minute. How many watts does it produce?
Answers
Answer:
\(1000\; {\rm W}\).
Explanation:
Joule is a unit for work, while watt is a unit for power- the rate at which work is being done. Divide work by time to find power.
By definition, one watt is equivalent to one joule-per-second. In other words: \(1\; {\rm W} = 1\; {\rm J \cdot s^{-1}}\). Note that the unit of time in this question is "minute", not second.
Apply unit conversion and ensure that the unit of time is "second":
\(\begin{aligned} 1\; \text{minute} &= 1\; \text{minute} \times \frac{60\; {\rm s}}{1\; \text{minute}} = 60\; {\rm s}\end{aligned}\).
The power of this generator would thus be:
\(\begin{aligned} \text{power} &= \frac{\text{work}}{\text{time}} \\ &= \frac{60\, 000\; {\rm J}}{60\; {\rm s}} \\ &= 1\, 000\; {\rm W} \end{aligned}\).