Elastic vs Inelastic Collisions

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.

Tags

NGSS.HS-PS2-2

NGSS.HS-PS2-3

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

Tags

NGSS.HS-PS2-2

NGSS.HS-PS2-3

A bat hits a baseball in the ideal physics world. The total momentum _____ after the collision.

• increased

• decreases

• remains constant

• stays at zero

Tags

NGSS.HS-PS2-2

Collisions where objects BOUNCE apart.

• inelastic collisions

• elastic collisions

• explosions

• none of these

Tags

NGSS.HS-PS2-2

Collision where objects collide, and stick together.

• inelastic collision

• elastic collision

• explosion

• none of these

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.

Tags

NGSS.HS-PS2-2

NGSS.HS-PS2-3

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)

Tags

NGSS.HS-PS2-3