Question

The power required to exert 4-N force over 3 meters in 2 seconds is

A) 4 W.
B) 6 W.
C) 8 W.
D) 12 W.
E) none of the above

Answer 1

B) 6 W

Step-by-step explanation:

First of all, we need to find the work done by the force. This is given by

`W=Fd`

where

F = 4 N is the magnitude of the force

d = 3 m is the distance through which the force is applied

Substituting,

`W=Fd=(4 N)(3 m)=12 J`

Now we can find the power, which is given by

`P=(W)/(t)`

where

W = 12 J is the work done by the force

t = 2 s is the time taken

Substituting,

`P=(12 J)/(2 s)=6 W`