A man of mass 60kg climbs up a 20m long staircase to the top of building 10m high. What is the work done by him

mass=60kg

h=20m

g=10m/s²

here the work done by the body is equal to its potential energy

work done=P.E.

As we know that P.E.=mgh

putting values

P.E.=60kg×20m×10m/s²

P.E.=1200kgm×10m/s²

P.E.=12000Nm

so the work done by the body is 12000Nm