Momentum & Impulse & Conservation Review

Collisions where objects BOUNCE apart.

• inelastic collisions

• elastic collisions

• explosions

• none of these

Momentum before = Momentum after

according to the Law of Conservation of _______________.

• Momentum

• Energy

• Force

• Acceleration

Two Pool Balls collide and then go separate directions.

• inelastic collision

• explosion

• elastic collision

• none of these

Collision where objects collide, and stick together.

• inelastic collision

• explosion

• elastic collision

• none of these

Which TWO variables determine the MOMENTUM for an object?

• time

• density

• velocity

• mass

 

A car has 10,800 kg m/s of momentum as it collides with a trash dumpster AT REST. How much TOTAL MOMENTUM will the car and dumpster have after collision?

• Less than 10,800 Kg x m/s

• More than 10,800 Kg x m/s

• The same. 10,800 Kg x m/s

• Not enough information.

 

A car has 10,800 kg m/s of momentum as it collides with a trash dumpster AT REST. How much TOTAL MOMENTUM will the car and dumpster have after collision?

• Less than 10,800 Kg x m/s

• More than 10,800 Kg x m/s

• The same. 10,800 Kg x m/s

• Not enough information.

Two football players with mass 50 kg and 65 kg run directly toward each other with velocities of 6 m/s east and 4 m/s west respectively. If they grab each other as they collide, the combined velocity of the two players just after the collision would be:

• 0.35 m/s

• 4.89 m/s

• did you remember to make the 2nd velocity negative?

• did you notice the word WEST?

What is the TOTAL MOMENTUM for the system BEFORE COLLISION?

• 14 kg m/s

• 24 kg m/s

• 10 kg m/s

• -24 kg m/s

What will the TOTAL MOMENTUM be AFTER COLLISION?

• 12 kg m/s

• 24 kg m/s

• 10 kg m/s

• -24 kg m/s