Mechanical Energy: KE and PE

Choose the answer that has the most ELASTIC POTENTIAL energy.

• a rubber band pulled back all the way

• a rubber band pulled back part of the way

• a rubber band laying on a table

Tags

NGSS.MS-PS3-2

Choose the answer that has the most GRAVITATIONAL POTENTIAL energy.

• a 500 kg boulder on a 5 meter hill

• a 500 kg boulder on a 10 meter hill

• a 500 kg boulder on a 20 meter hill

Tags

NGSS.MS-PS3-2

Choose the answer that has the most GRAVITATIONAL POTENTIAL energy.

• a car going 10 kmph on top of a mountain

• a car going 15 kmph on the 3rd floor of a parking garage

• a car going 20 kmph on an interstate ramp

Tags

NGSS.MS-PS3-2

NGSS.MS-PS2-4

What two factors affect GRAVITATIONAL POTENTIAL energy?

• mass

• height

• speed

• mass and speed

• mass and height

What two factors affect kinetic energy?

• mass

• speed

• height

• mass and speed

• mass and height

Tags

NGSS.MS-PS3-1

Which has more GRAVITATIONAL POTENTIAL energy and WHY? (Choose the BEST explanation!)

A roller coaster car at the top of a hill

OR

a roller coaster car at the bottom of the hill.

• The car at the top because it is not moving, so it has more potential energy.

• The car at the top because it is higher off the ground, so it has more GPE.

• The car at the bottom because it is going faster.

• The car at the bottom because it can't go any lower.

Tags

NGSS.MS-PS3-2

Which has more KINETIC energy and WHY? (Choose the BEST explanation!)

A roller coaster car at the top of a hill

OR

a roller coaster car at the bottom of the hill.

• The car at the top because it is not moving, so it has more potential energy.

• The car at the top because it is higher off the ground, so it has more GPE.

• The car at the bottom because it is going faster.

• The car at the bottom because it can't go any lower.

Tags

NGSS.MS-PS3-5

NGSS.MS-PS3-1

What is the mechanical energy of a system?

• just potential energy

• just kinetic energy

• the sum of the potential and kinetic energy

• kinetic energy minus potential energy

Devon is playing with a yo-yo. A yo-yo has an axle in the middle of two plastic halves. A string is tied around this axle. As Devon moves his hand, the yo-yo goes up and down. The yo-yo converts potential energy to kinetic energy as it moves.

Which of the following pictures represents the yo-yo with the most potential energy?

• 
• 
• 
• 

Tags

NGSS.MS-PS3-2

Which of the following situations describes an object's kinetic energy being converted into gravitational potential energy?

• A penny sits motionless on a shelf.

• A ball rolls up an inclined ramp.

• An apple is dropped from a second-story window.

• A water particle flows down a mountain stream.

Tags

NGSS.MS-PS3-2

NGSS.MS-PS3-5