Question

If 784j of work was done in lifting a 20 kg mass , calculate the height through which it was lifted.

Answer 1

Work Done = $mgh$
Work Done = $784 J$
$g =10$
Height = $\frac{Work Done}{mg}$ = $\frac{784}{20*10} = 3.92$

Answer 2

Work Done = mgh

Work Done = 784 J

g =10  

Height =  \frac{Work Done}{mg}  =   \frac{784}{20*10} = 3.92