Question

A student uses 80 joules of energy to lift a backpack in a time of 0.75 seconds. How much power

does the student have?

Answer 1

P = 106.7 W

Step-by-step explanation:

Given that,

Work done in lifting a backpack, W = 80 J

It is lifted in 0.75 seconds

We need to find the power of the student. The power of an object is defined as work done per unit time. So,

`P=(W)/(t)`

Put all the values,

`P=(80)/(0.75)\\\\P=106.7\ W`

So, the power of the student is 106.7 W.