Question

You expend 1000 w of power moving a piano 10 meters in 5 seconds. how much force do you exert

Answer 1

Answer:

Force, F = 500 N

Explanation:

Given that,

Power expanded, P = 1000 W

Distance moved by piano, d = 10 m

Time taken, t = 5 s

To find,

The force exerted by the person

Solution,

The rate at which the work is being done is called power delivered. Its formula is given by:

$P=\dfrac{W}{t}$

W is the work done, W = F × d

$P=\dfrac{Fd}{t}$

On rearranging the above formula to find F as :

$F=\dfrac{P t}{d}$

$F=\dfrac{1000\times 5}{10}$

F = 500 N

Therefore, the force exerted on the person is 500 N. Hence, this is the required solution.