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AP Physics (Momentum)

AP Physics (Momentum)

memorize.aimemorize.ai (lvl 286)
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Section 1

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Six automobiles are initially traveling at the indicated velocities. The automobiles have different masses and velocities. The drivers step on the brakes and the automobiles are brought to rest. Rank the automobiles based on the magnitude of their momentum before the breaks are applied from largest to smallest. 2000 kg, 5 m/s; 500 kg, 10 m/s; 1000 kg, 20 m/s; 4000 kg, 5 m/s; 500 kg, 20 m/s; 1000 kg, 10 m/s

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Mar 1, 2020

Cards (42)

Section 1

(42 cards)

Six automobiles are initially traveling at the indicated velocities. The automobiles have different masses and velocities. The drivers step on the brakes and the automobiles are brought to rest. Rank the automobiles based on the magnitude of their momentum before the breaks are applied from largest to smallest. 2000 kg, 5 m/s; 500 kg, 10 m/s; 1000 kg, 20 m/s; 4000 kg, 5 m/s; 500 kg, 20 m/s; 1000 kg, 10 m/s

Front

largest: (4000 kg, 5 m/s; 1000 kg, 20 m/s) medium: (2000 kg, 5 m/s; 500 kg, 20 m/s; 1000 kg, 10 m/s) smallest: (500 kg, 10 m/s)

Back

Two objects have the same momentum. How can one of the objects have more energy? 11

Front

Back

Six automobiles are initially traveling at the indicated velocities. The automobiles have different masses and velocities. The drivers step on the brakes and the automobiles are brought to rest. Rank the automobiles based on the force needed to stop them. 2000 kg, 5 m/s; 500 kg, 10 m/s; 1000 kg, 20 m/s; 4000 kg, 5 m/s; 500 kg, 20 m/s; 1000 kg, 10 m/s

Front

cannot be determined with the information given (need time)

Back

A truck going 15 km/hr has a head-on collision with a small car going 30 km/hr. What best describes momentum in the situation?

Front

They both have the same change in magnitude of momentum because momentum is conserved

Back

Two toy cars (mass A=1000 g, mass B=800 g) are ready to race. Both cars begin from rest. The cars' motors supply the same force to each car over the course of a 10 second race. For each question, state whether the correct answer is car A or car B or whether the two cars have equal values for the parameter in question. After 10 s which car has a larger kinetic energy?

Front

car B

Back

Two toy cars (mass A=1000 g, mass B=800 g) are ready to race. Both cars begin from rest. The cars' motors supply the same force to each car over the course of the 1 m race. For each question, state whether the correct answer is car A or car B or whether the two cars have equal values for the parameter in question. Which car crosses the finish line 1 m away first?

Front

car B wins

Back

An astronaut is a short distance away from her space station without a tether rope. She has a large wrench. What should she do with the wrench to move toward the space station?

Front

Throw it directly away from the space station

Back

A small car and a heavy pickup truck are both out of gas. The truck has twice the mass of the car. After you push both the car and the truck for the same amount of time with the same force, what can you say about the momentum and kinetic energy of the car and the truck? Ignore friction.

Front

they have the same momentum, but the car has more kinetic energy than the truck

Back

What is conserved in inelastic collisions?

Front

just momentum (not kinetic energy)

Back

Two toy cars (mass A=1000 g, mass B=800 g) are ready to race. Both cars begin from rest. The cars' motors supply the same force to each car over the course of the 1 m race. For each question, state whether the correct answer is car A or car B or whether the two cars have equal values for the parameter in question. Which car has the larger kinetic energy when it crosses the finish line 1 m away?

Front

both cars have the same kinetic energy

Back

What is the magnitude of impulse on a force vs. time graph?

Front

the area

Back

The space shuttle, in circular orbit around the earth, collides with a small asteroid which ends up in the shuttle's storage bay. For this collision what is conserved?

Front

only momentum is conserved

Back

A baseball is pitched horizontally toward home plate with a velocity of 110 km/hr. What scenario gives the baseball the largest change in momentum?

Front

the baseball is hit straight back to the pitcher at a speed of 110 km/hr

Back

A railroad tank car contains milk and rolls at a constant speed along a level track. The milk begins to leak out the bottom. The car then...

Front

maintains a constant speed

Back

As fuel burns the mass of a rocket decreases. If at a certain point the mass of a rocket is half its original mass and velocity is twice the original velocity, how are momentum and energy affected? 1

Front

Back

What is conserved in elastic collisions?

Front

kinetic energy (also momentum)

Back

A large mass M explodes into two smaller masses. Mass m moves to the right at speed v. What is the speed of the remaining piece of mass that must go to the left? 25

Front

Back

An Olympic diver dives off the high-diving platform. The magnitude of his momentum will be at maximum at...

Front

the bottom of the trajectory

Back

A bullet of mass mb is fired horizontally with speed vi at a wooden block of mass mw resting on a frictionless table. The bullet hits the block and becomes completely embedded within it. After the bullet has come to rest within the block, the block, with the bullet in it, is traveling at speed vf. This collision is...

Front

perfectly inelastic

Back

A golf ball and an equal-mass bean bag are dropped from the same height and hit the ground. The bean bag stays on the ground while the golf ball rebounds. Which experiences the greater impulse from the ground?

Front

the golf ball

Back

What is impulse?

Front

change in momentum

Back

You are lying in bed and want to shut your bedroom door. You have a bouncy "superball" and a blob of clay, both with the same mass. Which one would be more effective to throw at your door to close it?

Front

the superball

Back

A large mass explodes into two smaller masses. Mass m moves to the right at speed v. Mass M moves to the left at speed V. Calculate the speed V of mass M. 24

Front

Back

Two toy cars (mass A=1000 g, mass B=800 g) are ready to race. Both cars begin from rest. The cars' motors supply the same force to each car over the course of a 10 second race. For each question, state whether the correct answer is car A or car B or whether the two cars have equal values for the parameter in question. After 10 s which car has a larger momentum?

Front

both cars have the same momentum

Back

Six automobiles are initially traveling at the indicated velocities. The automobiles have different masses and velocities. The drivers step on the brakes and the automobiles are brought to rest. Rank the automobiles based on the magnitude of the impulse needed to stop them from largest to smallest. 2000 kg, 5 m/s; 500 kg, 10 m/s; 1000 kg, 20 m/s; 4000 kg, 5 m/s; 500 kg, 20 m/s; 1000 kg, 10 m/s

Front

largest: (4000 kg, 5 m/s; 1000 kg, 20 m/s) medium: (2000 kg, 5 m/s; 500 kg, 20 m/s; 1000 kg, 10 m/s) smallest: (500 kg, 10 m/s)

Back

What is conserved in any collision?

Front

momentum (total momentum before collision=total momentum after collision; m1v1+m2v2=m1v1+m2v2; it is conserved in both the x and y directions)

Back

Two identical billiard balls traveling at the same speed have a head-on collision and rebound. If the balls had twice the mass, but maintained the same size and speed, how would the rebound be different?

Front

no difference

Back

A rubber ball and a lump of clay 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 clay sticks to the wall. Which one of these objects experiences the greater momentum change?

Front

the ball

Back

What is an elastic collision?

Front

a golf club striking a ball (the objects don't stick together)

Back

A bowling ball hangs from a 1 m long cord. i) a 200 gram putty ball moving 5 m/s hits the bowling ball and sticks to it, causing the bowling ball to swing up ii) 200 gram rubber ball moving 5 m/s hits the bowling ball and bounces straight back up at nearly 5 m/s causing the bowling ball to swing up Describe what happens.

Front

the ball swings farther up in (ii) than (i)

Back

Which of Newton's Laws can be rewritten in terms of momentum?

Front

second F=ma F=m(v2-v1)/(t2-t1) F(t2-t1)=m(v2-v1) F(t2-t1)=(p2-p1)

Back

A bullet of mass mb is fired horizontally with speed vi at a wooden block of mass mw resting on a frictionless table. The bullet hits the block and becomes completely embedded within it. After the bullet has come to rest within the block, the block, with the bullet in it, is traveling at speed vf. What quantities ar conserved during this collision?

Front

momentum only

Back

Two objects both with mass m and velocity v intersect and collide perfectly inelastically. Determine the total momentum of this system. 20

Front

Back

A bullet of mass mb is fired horizontally with speed vi at a wooden block of mass mw resting on a frictionless table. The bullet hits the block and becomes completely embedded within it. After the bullet has come to rest within the block, the block, with the bullet in it, is traveling at speed vf. What is the speed of the block/bullet system after the collision?

Front

vf=((mb)(vt))/(mb+mw)

Back

A small car and a heavy pickup truck are both out of gas. The truck has twice the mass of the car. After you push both the car and the truck for the same distance with the same force, what can you say about the momentum and kinetic energy of the car and the truck? Ignore friction.

Front

they have the same kinetic energy but the truck has more momentum than the car

Back

What is momentum?

Front

mass x velocity

Back

When no external forces act, momentum is conserved in... 12

Front

Back

What is the magnitude of momentum on a force vs. time graph?

Front

the area

Back

Two toy cars (mass A=1000 g, mass B=800 g) are ready to race. Both cars begin from rest. The cars' motors supply the same force to each car over the course of a 10 second race. For each question, state whether the correct answer is car A or car B or whether the two cars have equal values for the parameter in question. Which car has traveled farther after 10 s?

Front

car B

Back

Two toy cars (mass A=1000 g, mass B=800 g) are ready to race. Both cars begin from rest. The cars' motors supply the same force to each car over the course of the 1 m race. For each question, state whether the correct answer is car A or car B or whether the two cars have equal values for the parameter in question. Which care has a larger momentum when it crosses the finish line 1 m away?

Front

car A

Back

Momentum is a ______ which means it can be broken into __________.

Front

vector; components (Px=MVx; Py=MVy)

Back

A small boat coasts at a constant speed under a bridge. A heavy sack of sand is dropped from the bridge onto the boat. The speed of the boat...

Front

decreases

Back