Practice - Conservation of Momentum

If two objects collide and stick together, what will happen to their overall momentum?

• momentum will decrease
• momentum will increase
• momentum will stay the same
• none of the above

Tags

NGSS.HS-PS2-2

If 2 objects collide and stick together, what will happen to their velocities?

• velocities will increase
• velocities will decrease
• velocities will stay the same
• none of the above

Tags

NGSS.HS-PS2-2

Pick all of the scenarios below that are Inelastic collisions.

• A catcher catches a baseball.

• A pitcher throws a baseball.

• Two cars smash into each other.

• Two students on roller skates push away from each other.

• A bug smashes into a windshield.

Tags

NGSS.HS-PS2-3

Pick all of the scenarios that are explosions.

• A cannon fires a cannon ball.

• A spoon is shoved into a jar of peanut butter.

• A linebacker tackles a member of the opposite team.

• A swimmer jumps off a floating raft.

• A figure skater throws a heavy ball.

Pick all of the scenarios below that are elastic collisions.

• Two bouncy balls hitting each other.

• A pitcher throws a baseball.

• Two cars smash into each other and bounce off.

• A bowling ball striking a pin

• A bug smashes into a windshield.

The recoil speed of a rifle is much less than the exit velocity of a bullet because...

• the rifle experiences a smaller force
• the rifle experiences a smaller change in momentum
• the rifle has a much greater mass
• the rifle does not obey the laws of physics

Tags

NGSS.HS-PS2-1

NGSS.HS-PS2-2

A block sliding on a frictionless surface runs into a second block of equal mass at rest. After the two collide, they stick together and travel with a velocity...

• that is twice the magnitude of the original velocity
• that is half the magnitude of the original velocity
• more information is needed

Tags

NGSS.HS-PS2-2

How much momentum does a 50 kg mass moving at 10 m/s have?

• 5 kg m/s
• 500 kg m/s
• 5 N
• 500 N

Tags

NGSS.HS-PS2-2

The law of conservation of momentum states that, 

• p before is less than p after
• p before is the same as p after
• p before is more than p after

Tags

NGSS.HS-PS2-2

When the speed of an object is doubled, its momentum

• remains unchanged in accord with the conservation of momentum.
• doubles
• quadruples
• decreases

Tags

NGSS.HS-PS2-2