Question

A person weighing 500 N climbs 3 m. How much power is needed to make the climb in 5 sec?

Answer 1

work = 500*3 = 1500 J
1500J in 5 sec = 300 watts

Hope that helps:)

Answer 2

Answer: The power needed by the person is 300 W

Step-by-step explanation:

Power is defined as the ratio of rate of work done by an object.

Mathematically,

`P=(W)/(t)`

where,

P = power of the person

W = work done by the person =
`(F* d)`

F = force applied by the person = 500 N

d = displacement of the person = 3 m

t = time taken = 5 sec

Putting values in above equation, we get:

`P=(F* d)/(t)\\\\P=(500N* 3m)/(5sec)\\\\P=300W`

Hence, the power needed by the person is 300 W