Question

It takes me 12s to lift a box upward with 20 N of force to a height of 45m. What was my power output ?

Answer 1

Answer:

75Watts

Explanation:

Given parameters:

Time  = 12s

Force applied  = 20N

Height  = 45m

Unknown:

Power output  = ?

Solution:

Power is defined as the rate at which work is done.

 It is mathematically expressed as;

        Power  = $\frac{work done}{time}$

Work done  = force x distance  = 20 x 45  = 900J

        Power  = $\frac{900}{12}$   = 75Watts