Work, Power, Energy Review

True or false
You do work only when you exert a force on an object and move it

• true
• false

work is a measurement of how much force is applied over a certain

• distance
• velocity
• shape
• size

units for work are

• netwons
• joules
• meters
• seconds

if you push a cart with a force of 60 N for 2 m... how much work have you done

• 120 J
• 30 J
• 120 N 
• 30 N

Tags

NGSS.MS-PS3-5

The unit used to measure power is the 

• Watt
• Newton
• Joule
• Newton*meter

How much time is needed to produce 720 Joules of work if 90 watts of power is used? 

• 0.125 s
• 8 s
• 64800 s
• 80 s

Power is defined as the quantity that measures the rate at which _____ is done or energy is transformed.

• energy
• time
• work
• elasticity

A 10.0 kg box is accelerated from 2.0 m/s to 4.0 m/s. What is the amount of work needed to accelerate the box?

• 50 J

• 60 J

• 20 J

• 45 J

Tags

NGSS.HS-PS3-1

When my velocity triples, my kinetic energy increases by ______ times.

• 9
•  3 
• 1.5
• 4.5

Which of the following statements are true about potential energy?

• Both gravitational and elastic potential energy are dependent upon the speed of an object.

• Moving objects cannot have potential energy.

• None of these

• Potential energy is the energy stored in an object due to its position.

Tags

NGSS.MS-PS3-2