PE/KE Calculations and Concept Review

What kind of energy does a marble at the top of a hill have?

• gravitational potential

• chemical potential

• kinetic

• thermal

Tags

NGSS.MS-PS3-2

What is the equation for gravitational potential energy

• mv

• 1/2 mv^2

• mgh

• Ft

Tags

NGSS.MS-PS3-2

If the marble had a mass of 0.3kg and the hill was 2.3 m tall, how much potential energy did it have at the top of the ramp?

• 2.3 J

• .23 J

• 6.9 J

• 5.2 J

Tags

NGSS.MS-PS3-2

What kind of energy does a marble rolling at the bottom of the hill have?

• gravitational potential

• chemical potential

• kinetic

• thermal

Tags

NGSS.MS-PS3-1

NGSS.MS-PS3-5

If the 0.3 kg marble was moving at 6 m/s at the bottom of the ramp, how much kinetic energy did the marble have?

• 5.4 J

• 1.8 J

• 3 J

• 6 J

Tags

NGSS.MS-PS3-1

What does conservation of energy mean?

• Total energy increases

• Total energy decreases

• Total energy stays the same

If the marble had 6.9 J of (potential) energy at the top of the hill and 5.4 J of (kinetic) energy at the bottom of the hill, was energy conserved and why?

• Yes because the total energy stayed the same

• Yes because the total energy changed

• No because the total energy stayed the same

• No because the total energy changed

Tags

NGSS.MS-PS3-5

The marble had 5.4 J of kinetic energy and then hit the stationary basketball. The basketball started rolling and the marble stopped rolling. The rolling basketball now has 5.4 J of kinetic energy. Was energy conserved and why?

• Yes because the total energy stayed the same

• Yes because the total energy changed

• No because the total energy stayed the same

• No because the total energy changed

Tags

NGSS.MS-PS3-5

What is the formula for Kinetic Energy?

• PE = mgh

• KE = 1/2mv²

• W = Fd

• P = W/t

Tags

NGSS.MS-PS3-1

NGSS.MS-PS3-5

What is the KE of a football which has a mass of 0.8 kg and is kicked at a velocity of 10m/s?

• 80 J

• 3.2 J

• 160 J

• 40 J

Tags

NGSS.MS-PS3-1

NGSS.MS-PS3-4