Question

The crane raised the body to a height of 9 m in 30 s and performed 18 kJ work.

a) What force did the crane exert on the body if it lifted it

Answer 1

F = 2000 N

Step-by-step explanation:

Given that,

The crane is lifted upto a height of 9 m in 30 s and performed 18kJ of work.

We need to find the force did the crane exert on the body if it is lifted it.

We know that,

Work done when the crane is lifted ia given by :

`W=F* h\\\\F=(W)/(h)\\\\F=(18000)/(9)\\\\F=2000\ N`

So, 2000 N of force is exerted on the body if it is lifted it.