Work Energy Power Review

A pendulum has 10 J of gravitational potential energy at its highest point. How much kinetic energy does it have at its lowest point?

• 0 J

• 2 J

• 5 J

• 10 J

Tags

NGSS.HS-PS3-1

NGSS.HS-PS3-2

At one point, a falling apple has 2 J of gravitational potential energy and 7 J of kinetic energy. How much kinetic energy does it have when it hits the ground?

• 2 J

• 7 J

• 9 J

• 5 J

Tags

NGSS.MS-PS3-1

NGSS.MS-PS3-4

A solar panel is connected to a lamp. Does the panel do positive or negative work on the lamp?

• positive

• negative

• not enough information

A horse pulls a cart from rest to 3 m/s. Does the horse do positive or negative work on the cart?

• positive

• negative

• not enough information

Tags

NGSS.HS-PS2-1

A box slides from 12 m/s to 6 m/s across a carpet. Does the carpet do positive or negative work on the box?

• positive

• negative

• not enough information

How much energy is used by a 100 W light bulb over 1 hour?

• 100 J

• 36,000 J

• 360,000 J

• 240,000 J

A 25 kg cart in moving at 15 m/s when it hits a rough road and then slides to a stop in 30 m. What is the work done by friction?

• 3.75 J

• -3.75 J

• 84,375 J

• -84,375 J

Tags

NGSS.HS-PS3-1

What is a unit for power?

• J

• N

• J/s

• m/s/s

Each of the boxes shown is pulled for 10 m across a level, frictionless floor by the force given. Which box experiences the greatest change in its kinetic energy?

• A

• B

• C

• D

• E

Tags

NGSS.HS-PS2-1

A small child slides down the four frictionless slides A–D. Rank in order, from largest to smallest, her speeds at the bottom.

• vD > vA > vB > vC

• vD > vA = vB > vC

• vC > vA > vB > vD

• vA = vB = vC = vD

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2

NGSS.MS-PS3-1

NGSS.MS-PS3-2