Work, Power and Energy

The unit used to measure power is the 

• Watt
• Newton
• Joule
• Newton*meter

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.HS-PS3-2

Calculate the work done by a 47 N force pushing a pencil 0.26 m.

• 12.2
• 13.5
• 12.8
• 11.2

Work of 2000 J is required to push an object 1,500 m. What is the force?

• 2.5 N
• 1.3 N
• 1.6 N
• 12 N

Two movers applied a total force of 350 N to push chest up a ramp into a truck. If the work that they did 1,400 J, calculate the height of the ramp?

• 4 m

• 3 m

• 2 m

• 1 m

Tags

NGSS.MS-PS2-2

You move an 8-newton weight five meters in 4 seconds. How much power have you generated?

• 160 watts
• 10 watts
• 6.4 watts
• 17 watts

How much power is used if a force of 35 Newtons is used to push a box a distance of 10 meters in five seconds? (Hint: Solve for work first. This is a 2-step problem.)

• 70 W

• 3.5 W

• 7 W

• 350 J

How far does a 18,210.9 newton car go if it it exerts 91,054.5 watts of power in 20 seconds.

• 100 meters

• 2500 meters
• 1000 meters
• 500 meters

Tags

NGSS.HS-PS3-1

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

This weight lifter required 1029.7 newtons of force to bring the weights to a height of approximately 2.31 m in 9 seconds. How much power did he have?

• 264 Watts

• 1029 Watts

• 2,377 Watts

• 4,009 Watts

Tags

NGSS.HS-PS3-2