Question

A crane does 62,500 joules of work to lift a boulder a distance of 25.0 meters. How much did the boulder 

weigh?

Answer 1

`W=Fs \\ F=(W)/(s)`
W - work
F - weight
s - distance


`W=62 500 \ J = 62 500 \ N \cdot m \\ s=25 \ m \\ \\ F=(62500 \ N \cdot m)/(25 \ m)=2500 \ N`

The boulder weighed 2500 newtons.