9AD_Period_2_Collision and Kinetic Energy

A 2.5 kg ball moving at 4.2 m/s collides with a 2.5 kg stationary ball. If the first ball is at rest after the collision, what is the velocity of the second ball? 

• 2.1 m/s
• 2.5 m/s
• 4.2 m/s
• 8.4 m/s

Tags

NGSS.HS-PS2-2

Collisions can be ____________or ___________.

• fast or slow
• far or near
• elastic or inelastic
• none of the above

Tags

NGSS.HS-PS2-2

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

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-PS3-1

NGSS.HS-PS3-2

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-PS2-2

NGSS.HS-PS2-3

This is an example of what kind of collision?

• Elastic

• Inelastic

• neither elastic or inelastic

• both

Tags

NGSS.HS-PS2-2

NGSS.HS-PS2-3

This picture is an example of ____________

• Elastic Collision

• Inelastic collision

• neither elastic or inelastic

• both

Tags

NGSS.HS-PS2-2

NGSS.HS-PS2-3