4th Physics Collisions

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 in separate directions.

• inelastic collision

• elastic collision

• explosion

• none of these

Collision where objects collide, and stick together.

• inelastic collision

• elastic collision

• explosion

• none of these

For every action, there is an equal and opposite reaction.

• Newton's 1st Law

• Newton's 2nd Law

• Newton's 3rd Law

• none of these

Which TWO variables determine the MOMENTUM for an object?

• time & velocity

• time & density

• density & mass

• velocity & mass

A trampoline increases __________________, which in turn decreases _____________________.

• force / time

• mass / weight

• time / force

• acceleration / velocity

Action: Your foot applies a downward force onto the floor.

Reaction?

• Your foot pushes through the floor.

• Your foot bounces off of the floor.

• The floor applies an equal and opposite force upward on your foot.

• The floor collapses.

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

An insect applies 1.5 N of force to a windshield of a moving car. How much force does the windshield apply to the insect?

• 15,000 N

• 1.5 N

• 0.5 N

• Not enough information