Question

12- Calculate the power when a force of 60N moves an object over a distance of 0.6 km in 20

minutes

A. 100watts

B. 6,000 watts

C. 0.25watts

D. 30 watts

Answer 1

Hi there!

To solve, we must begin by calculating the total WORK done on the object.

W = F · d (Force · displacement)

Plug in the given values. Remember to convert km to m:

1 km = 1000 m

0.6 km = 600 m

W = 60 · 600 = 36000 J

Now, we can solve for power:

P = W/t

Convert minutes to seconds:

1 min = 60 sec

20 min = 1200 sec

P = 36000/1200 = 30 W ⇒ Choice D.