Question

A crane leaves a load of 500kg very slow throw a vertical distance of 75cm. Calculate the work done against gravity of g=10ms

Answer 1

Given:

$m=500\:\rm kg$

$h=0.75\:\rm m$

$g=10\:\rm m/s^2$

The work done

$$W=mgh=500*10*0.75=3750\:\rm J$$