Energy unit studyguide

_____________ is energy that an object stores due to its position.

• potential energy

• kinetic energy

• mechanical energy

• thermal energy

As an object is lifted higher from the Earth's surface, its potential energy _______________.

• increases

• descreases

• stays the same

• none of these

What is the formula for calculating Gravitational Potential Energy?

• PE = mass X gravity X height

• PE = spring constant X stretch/compression

• PE = gravity X height

• PE = mass X gravity

What is kinetic energy?

• energy of motion

• energy due to position

• energy due to chemical bonds

• energy due to heat

What formula is used to represent the kinetic energy of an object?

• KE = 0.5 X mass X velocity squared (KE = 1/2mv²⁾

• KE= mass X gravity X height (KE = mgh)

• KE = 0.5 X mass X velocity (KE = 1/2mv⁾

• KE = mass X velocity (KE = mv⁾

What unit is Kinetic Energy measured in?

• Joules

• pounds

• m/s²

• quarts

What is the kinetic energy of a 2 kg ball moving with a velocity of 3 m/s?

KE = 1/2 m X v²

• 9 Joules

• 5 Joules

• 6 Joules

• 1 Joule

If there is no friction on this track, at which point would the coaster have the most kinetic energy?

• A

• B

• C

• D

Where is the roller coaster gaining potential energy?

• A to B

• B to C

• C to D

• The roller coaster is always losing potential energy

1. John is driving his truck down the street with an overall mass of 500 kg. He is traveling at 12 m/s when he sees a cat run across the street. He slams on the brakes. How much work was done by friction to the truck to slow it down to 4 m/s over a 5 m distance?

• 32,000 J

• 30,500 J

• 29,896 J

• 0 J