Semester 2 Question bank

A car and bird are about to hit each other. What is not true about the collision?

• They will have the same change in velocity

• They will experience the same force.

• They will experience the same change in momentum

• The total momentum is the same before and after the collision.

A 1 kg ball rolling 4 m/s runs into another 2 kg ball which is not moving. How much total momentum does the balls have before the collision

• 4

• 6

• 12

• 0

A 1 kg ball rolling 4 m/s runs into another 2 kg ball which is not moving. How much total momentum does the balls have after the collision?

• 4

• 12

• 6

• 0

A boy is standing on a skateboard. Before he throws the ball, the skateboard is not moving. After he throws the ball the skateboard will ...

• remain still.

• move forward slower than the ball.

• move backward faster than the ball.

• move backwards slower than the ball.

A boy is standing on a skateboard. He tries to make himself go backwards by throwing a ball forward. He can go backwards faster if he ...

• throws the ball faster

• throws a larger ball

• both these will work

The box on the left runs into the box on the right and they stick together. The resulting velocity will be..

• 4 m/s

• more than 4 m/s

• less then 4 m/s

The box on the left runs into the box on the right and they stick together. The total momentum before the collision is ________ kg m/s

• 8

• 4

• 10

• 16

The box on the left runs into the box on the right and they stick together. The total momentum after the collision is ________ kg m/s

• 8

• 4

• 10

• 16

The two blocks shown in the picture are about to collide and stick together. Which direction will they go after the collision?

• To the left

• To the right

• They will both stop in the middle

The two blocks shown in the picture are about to collide and stick together. What is the momentum of this system?

• 10

• 6

• 18

• 3