Momentum and Collisions Test

A child with a mass of 23 kg rides a bike with a mass of 5.5 kg at a velocity of 4.5 m/s to the south. Compare the momentum of the child with the momentum of the bike.

• Both the child and the bike have the same momentum

• the bike has a greater momentum than the child

• the child has a greater momentum than the bike

• neither the child nor the bike has momentum

A biker with a mass of 75 kg moves along the path with a constant velocity of 5 m/s. What is the biker's momentum?

• 25 m/s
• 375 m/s
• 25 kg m/s
• 375 kg m/s

In a physics experiment, two carts of mass 1.5 kg each are rolled towards each other.  The orange cart has a velocity of 2 m/s and the blue cart has a velocity of -1m/s.  The carts stick together when they collide.  Calculate their final speed.

• 0.5 m/s
• 1.0 m/s
• 0.33 m/s
• 0.67 m/s

A 2 kg cart has a momentum of 16 kg m/s. What is its velocity?

• 8 m/s
• 32 m/s
• 0.125 m/s
• 18 m/s

A 5000 kg truck is at rest and a 0.01 kg bug is crawling at 0.2 m/s. Which object has more momentum?

• more information needed

• truck

• bug

• same for both

What is the mass of an ostrich running North at 16.2 m/s that has a momentum of 2187 kgm/s North?

• 135 kg

• 35,429.4 kg

• 32.4 kg

• 0.0074 kg

The table above describes ball X and Ball Y.

Which of the following best compares the momentum of the two balls?

• Both balls have the same momentum because they have the same mass.

• Both balls have the same momentum because they have the same inertia.

• Ball Y has greater momentum than ball X because ball Y has no velocity.

• Ball X has greater momentum than ball Y because ball X has greater velocity.

Which of the following has the least momentum?

• a 100 kg mass with a 2 m/s velocity

• a 1 kg mass with a 100 m/s velocity

• a 10 kg mass with an 11 m/s velocity

• a 0.5 kg mass with a 1000 m/s velocity

A 2 kg ball experiences a 50 N force, causing its velocity to change from 5 m/s to 10 m/s. For how long did the force act?

• 5 s

• 0.5 s

• 0.2 s

• 500 s

This picture is an example of ____________

• Elastic Collision
• Inelastic collision