Answer to Question #292915 in Classical Mechanics for Vena

Question

How much work is done in lifting a 2-kg ball 0.5m high? Express your answer in a) joules and b) ergs.

Answer 1

Solution

Mass of ball m=2kg

Height to lift h=0.5m

So work is done

a) W=mgh

$=2\times9.81\times0.5\\=9.81N$

b)1J=10⁷ ergs

Work done

$W=9.81\times10^7ergs.$