Physics final

The units for momentum are

• kg
• m/s
• kg-m/s
• kg/m/s

A 2 kg object is dropped from a height of 12 m. What is the kinetic energy of the object as it strikes the ground?

• 1.63 J
• 2.44 J
• 235 J
• 576 J 

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

A 0.250 kg cart moving at 0.400 m/s has how much momentum?

• 0.1 kg-m/s
• 1 kg-m/s
• 10 kg-m/s
• 100 kg-m/s

In this type of collision, objects tend to "stick" together.

• elastic
• inelastic 
• They "stick" together in both types of collisions

When the speed of an object is doubled, its momentum

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

An 1 kg object moving to the right at 2 m/s collides inelastically with a 1 kg object moving to the left at 2 m/s. The final velocity of both objects will be 

• 0 m/s
• 1 m/s
• 2 m/s
• 4 m/s

Mechanical Energy is another name for just Kinetic Energy

• True
• False

Potential Energy is stored energy

• False
• True

Kinetic Energy is energy of motion

• True
• False