Elastic Collisions

Velocity is a vector which means it has which of the following?

• Direction

• Speed

• Magnitude

• Distance

What is an elastic collision?

• An elastic collision is an encounter between two bodies in which the total kinetic energy of the two bodies is different.

• An elastic collision is an encounter between two bodies in which the total kinetic energy of the two bodies remains the same.

• An inelastic collision is an encounter between two bodies in which the total kinetic energy of the two bodies remains the same.

What is an inelastic collision?

• When two objects collide, becoming stuck together and internal kinetic energy is lost (but not really lost, it transfers to different forms of energy)

• When two objects collide, becoming stuck together and internal kinetic energy is lost

• When two objects don't collide, becoming stuck together and internal kinetic energy is lost (but not really lost, it transfers to different forms of energy)

What two variables effect momentum?

• mass

• weight

• height

• Velocity

Do both objects have velocities acting in the same direction?

• No

• Yes

• No idea

What is the equation for momementum?

A collision occurs when ...

• two or more objects hit each other with a force.

• an object in motion stays in motion.

• when an object at rest stays at rest.

Select all the examples of collisions.

• car crash

• baseball bat hitting a baseball

• your fingers pushing the keys on a keyboard

• a car running at a fast speed

Inertia is ...

• When two objects hit each other with force.

• A measurement on how easy it will be to stop a moving object.

• The tendency of an object at rest to stay at rest or an object in motion to stay in motion.

An object's inertia depends on ...

• the weight or mass of the object

• mass and velocity