Power and Work

If 360 J of work is needed to move a crate a distance of 4 m, what is the weight of the crate?

• 90 N

• 720 N

• 90 kg

• 720 W

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2

NGSS.MS-PS2-4

A box is pushed across the floor a distance of 8 m with a force of 55 N in 7 s. What is the work done?

• 440 J

• 440 W

• 62.9 J

• 62.9 W

Tags

NGSS.MS-PS3-4

NGSS.MS-PS3-5

An Xbox consumes 15.7 watts while in standby mode. If you leave it in standby mode for 86,400 seconds (one day), how much work was done?

• 1,356,490 J

• 1,356,480 J

• 1,356,470 J

• 1,356,460 J

Work is measured in which units?

• Newtons

• Joules

• Watts

• Joule/sec

Tags

NGSS.MS-PS3-4

NGSS.MS-PS3-5

If 150 Joules of work is needed to move a box 10 meters, what force was used? 

• 1500 N

• 15 N

• 1.5 N

• 150 N

You move a 0.8 kg object five meters in 4 seconds. How much power have you generated?

• 160 watts

• 10 watts

• 6.4 watts

• 17 watts

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-PS2-2

work transfers

• sweat

• energy

• velocity

• effort

Tags

NGSS.MS-PS3-4

NGSS.MS-PS3-5

The equation for POWER is

• power = mass x time

• power = work / time

• power = time / work

• power = work x time

Brutus is a weightlifter. He completes a lift in 3.5 s, what is the power of Brutus, if he performed 660.0J of work?

• 2310 J

• He performs no work

• 189 J