How do i solve this? please help me.

Question

You expend 1000 W of power in moving a piano 10 meters in 5 seconds. How much force do you exert?
A. 50,000 N
B. 50 N
C. 500 N
D. 250 N

Answer 1

The formula for power is

 

P = Fd / t

 

where:

P = power

F = force

d = distance

t = time

 

Known:

P = 1000 W

d = 10 m

t = 5 sec

 

Plug in these values into the formula to solve for F.  But before we do so, we can solve for F from the formula by algebraic manipulation.

 

F = Pt / d

 

 

Now plug in the values.