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AP Physics 1 Multiple Choice

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Section 1

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In an INELASTIC collision between two objects

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Physics

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Date created

Mar 14, 2020

Cards (48)

Section 1

(48 cards)

In an INELASTIC collision between two objects

Front

the momentum is conserved the kinetic energy is not

Back

A rubber ball with a speed of 5 m/s collides head on elastically with an identical ball at rest. What is the speed of the initially stopped ball after the collision

Front

5.0 m/s

Back

A diver initially moving horizontally with the speed of v dives off the edge of a cliff and lands in the water at distance d from the base of the cliff. How far from the base of the cliff would the diver have landed if the diver initially had been moving horizontally with a speed 2v.

Front

2d

Back

A solid uniform sphere of mass of 120 kg and radius of 1.7 m starts from rest and rolls without slipping down an inclined plane of vertical height of 5.3 m. What is the angular speed of the sphere at the bottom of the inclined plane?

Front

5.1 rad/s

Back

What is the velocity of a wave that has a wavelength of 2 m and a frequency of 24 Hz?

Front

48 m/s (v=f x wavelength)

Back

Suppose that an object travels from one point in space to another. Make a comparison between the displacement and the distance traveled.

Front

the displacement is either less than or equal to the ditance traveled

Back

Two objects are thrown vertically upwards simultaneously, one on the surface of Earth and the other on the surface of the Moon. Both have initial velocity of 20 m/s. Both objects will take the same time to reach the highest point of their trajectory.

Front

False

Back

A chicken is running in a circular path with an angular speed of 1.52 rad/s. How long does it take the chicken to complete one revolution? ASK

Front

2.07 s

Back

When a rigid object rotates about a fixed axis, what is true about all the points in the object?

Front

They all have the same angular acceleration, and they all have the same angular speed

Back

Two wave pulses pass each other on a string. The one traveling toward the right has a positive amplitude, while the one traveling toward the left has an equal amplitude in the negative direction. At the point that they occupy the same region of space at the same time

Front

destructive interference occurs

Back

A pendulum has a period of 2 s on Earth. What is its length?

Front

1 m

Back

If the velocity of an object is 0, then the object cannot be accelerating

Front

false

Back

A wheel accelerates from rest to 59 rad/s at a uniform rate of 67 rad/s^2. through what angle (in radians) did the wheel turn while accelerating?

Front

26 rad

Back

an airplane starts from rest and accelerates at a constant rate 10.8 m/s^2. What is its speed at the end of the 400 m long runway?

Front

93 m/s v^2 = 0 + (2 x 10.8)(400)

Back

A disk, a hoop, and a solid sphere are released at the same time at the top of an inclined plane. They are all uniform and roll without slipping. In what order do they reach the bottom?

Front

sphere, disk, hoop

Back

For a periodic process, the number of cycles per unit time is called the

Front

frequency

Back

You are standing on a skateboard, initially at rest. A friend throws a heavy ball towards you. you can either catch the ball or deflect the ball back towards your friend. (such that it moves away from you at the same speed it was originally thrown). What should you do in order to MINIMIZE your speed on the skateboard.

Front

Catch the ball

Back

The frequency of a wave increases. What happens to the distance between successive crests if the speed remains constant?

Front

It decreases

Back

The time for one cycle of a periodic process is called the

Front

period

Back

A ball is thrown downward from the top of a building with an initial speed of 25 m/s. It strikes the ground after 2 s. How high is the building?

Front

70 m

Back

For a projectile launched horizontally, the vertical component of a projectile's velocity

Front

continuously increases

Back

a 1000 kg car traveling at 25 m/s runs into the rear of a stopped car with a mass of 1500 kg and they stick together. What is the speed of the cars after the collision.

Front

10 m/s 1000(24) + 15000(0) = 25000(vf)

Back

Two wave pulses with equal positive amplitudes pass each other on a string, one is traveling toward the right and the other toward the left. At the point that they occupy the same region

Front

constructive interference occurs

Back

A 4 N force acts for 3 s on an object. The force suddenly increases to 15 N and acts for one more second. What impulse was imparted by these forces to the object?

Front

27 N/s

Back

A rubber ball and a lump of putty have equal mass. They are thrown with equal speed against a wall. The ball bounces back with nearly the same speed with which it hit. The putty sticks to the wall. Which object experience the greater momentum change?

Front

the ball

Back

the slope of a position vs. time graoh is

Front

velocity

Back

A projectile is launched with initial velocity at an angle of 30 degrees above the horizontal. If a second projectile is launched with the same initial velocity but at an angle of 60 degrees above the horizontal

Front

The ranges of the two projectiles will be identical

Back

When is the average velocity of an object equal to the instantaneous velocity?

Front

only when the velocity is constant

Back

the slope of a velocity vs. time graph is

Front

acceleration

Back

A merry go round spins freely when Diego moves quickly to the center along a radius of the merry go round. As he does this, it is true to say that

Front

The moment of inertia of the system and decreases the angular speed increases

Back

In an elastic collision, if the momentum is conserved, then which of the following statements is true about kinetic energy?

Front

Kinetic energy is also conserved

Back

You are trying to hit a friend with a water balloon. He is sitting in the window of his dorm room directly across the street. you aim straight at him and shoot. Just when you shoot, he falls out the window. Does the water balloon hit him?

Front

yes

Back

The horizontal and vertical components of the initial velocity of a football are 24 m/s and 7 m/s respectively. What is the initial velocity of the football?

Front

25 m/s

Back

Objects A and B both start at rest. They both accelerate at the same rate. However object A accelerates for twice the same time as object B. What is the final speed of object A to that of object B?

Front

twice as fast

Back

When is angular momentum of a system constant?

Front

Only when no net external torque acts on the system.

Back

A stone is thrown horizontally from the top of a tower at the same instant a ball is dropped vertically. Which object is traveling faster when it hits the level ground below?

Front

the stone

Back

a ball is thrown with a velocity of 20 m/s at an angle of 60 degrees above the horizontal. What si the horizontal component of its instantaneous velocity at the exact top of its trajectory.

Front

10 m/s

Back

Ball A is dropped from the top of a building. One second later, ball B is dropped from the same building. As time progresses, the distance between them

Front

increases

Back

A mass on a spring undergoes SHM. When the mass passes through the equilibrium position, its instantaneous velocity

Front

is maximum

Back

Two objects collide and bounce off each other. Linear momentum

Front

is definitely conserved

Back

A 70 kg astronaut is space walking outside the space capsule and is stationary when the tether line breaks. As a means of returning to the capsule he throws his 3 kg space hammer at the speed of 14 m/s away from the capsule. At what speed does the astronaut move toward the capsule?

Front

.4 m/s (70+2)(0) = (2x14) + (70 x vf)

Back

Which part of a vibrating string experiences the maximum acceleration

Front

antinodes

Back

Ball A is dropped from the top of a building. One second later, ball B is dropped from the same building. as time progresses, the difference in their speeds

Front

remains constant

Back

The distance between two successive crests on a wave is called the wave's

Front

wavelength

Back

When two mechanical waves coincide, the amplitude of the resultant is always ___ the amplitudes of each wave alone

Front

the sum of

Back

A mass is attached to a vertical string and bobs up and down bewteen points A & B. Where is the mass located when its kinetic energy is a minimum?

Front

at either A & B

Back

A car heading north collides at an intersection with a truck heading east. If they lock together and travel at 28 m/s at 23 degrees north of east just after the collision, how fast was the cra initially traveling? Assume that the two vehicles have the same mass.

Front

22 m/s

Back

Two children, Justin and Beyonce, ride a merry go round. Justin is a greater distance from the axis of rotation than Beyonce. Which of the following of the statements are true?

Front

Justin has a greater tangential speed than Beyonce Beyonce and Justin have the same angular speed (always will have the same angular speed no matter distance, tangential speed and moment of inertia are greater when farther)

Back