Energy, Work, and Power Review

How much power is expended if you lift a 200 N crate 2 meters in 5 seconds?

• 40 W

• 80 W

• 120 W

• 200 W

Potential Energy is the energy an object has because of its

• size.

• speed.

• location.

• temperature.

Tags

NGSS.MS-PS3-2

You walk up the stairs two times. One time slowly, and the other running. Both jobs require the same amount of _______ but different amounts of _________.

• Power, Work

• Work, Power

• Energy, Velocity

• Energy, Joules

An object that has kinetic energy must be

• at rest.

• moving.

• elevated.

Tags

NGSS.HS-PS3-2

What is power?

• work done times the time.

• Work done divided by time.

• distance divided by time.

• Force applied times the time.

The unit of work is

• watt

• Joule

• Newton

• Meter

Tags

NGSS.HS-PS2-1

An object at rest may have

• momentum.

• Energy.

Tags

NGSS.HS-PS3-2

Calculate the work in lifting a 25 kg sack of potatoes 4 meters. (You need to solve for the weight (the force) of the potatoes first)

• 100 Joules

• 1000 Joules

• 10,000 Joules

• 6.25 Joules

Tags

NGSS.HS-PS2-1

What is the definition of work?

• force times distance

• force divided by time

• distance divided by time

• force times time

How much work is done on a 40 N crate that you lift 3 meters?

• 100 J

• 150 J

• 120 J

• 300 J