Answer:
F = 2000 N
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 :
[tex]W=F\times h\\\\F=\dfrac{W}{h}\\\\F=\dfrac{18000}{9}\\\\F=2000\ N[/tex]
So, 2000 N of force is exerted on the body if it is lifted it.
