Work and Power

If 200 Joules of work is needed to move a box 15 meters, what force was used?

• 13.33 N

• 25.34N

• 10 N

• 15 N

If 400 Joules of work are needed to move a crate a distance of 6 meters, what is the force used to move the crate?

• 66.66 N

• 75.92 N

• 12.17 N

• 63.88 N

If a group of workers can apply a force of 1350 Newtons to move a crate 35 meters, what amount of work will they have to accomplish?

• 47,250 J

• 56,348 J

• 20,000 J

• 75,693 J

If 86 Joules of work were necessary to move a 7 Newton crate, how far was the crate moved?

• 12.28 m

• 82.21 m

• 14.25 ft

• 12.28 ft

How much work is done in holding a 30 N sack of potatoes while waiting in line at the grocery store for 15 minutes? Distance traveled is 0 m.

• 0 J

• 0.5 N

• 0 N

• 125 J

If a man moves a large box that weighs 30 Newtons 10 meters in 20 seconds, how much power was used?

• 15 p

• 15 w

• 20 p

• 12 w

A person weighing 300 N gets on an elevator. The elevator lifts the person 40 m in 20 seconds. How much power was used?

• 600 w

• 550 w

• 650 w

• 585 w

How much time is needed to produce 1000 Joules of work if 65 watts of power is used?

• 15.38 s

• 38.34 min

• 12.50 s

• 1 hr

If 136 w of power is produced in 18 seconds, how much work is done?

• 2448 J

• 3000 J

• 2200 J

• 2353 J

A set of pulleys lifts an 400 N crate 7 meters in 4 seconds. How much power was used?

• 700 W

• 13.55 W

• 14.84 W

• 15 W