Question

a boy of weight 50kg climbs up vertical height of 100 m. calculate amount of work done by him. How much Potential energy does he get? (g=10m/s^2)

Answer 1

Mass of the boy = 50kg

Acceleration due to gravity, g
$=9.8 \: m \: per \: s {}^{2}$
Vertical height that the boy climbed up,h
= 100m

Work done by the boy
=mgh
=50*9.8*100
=49000 J
$4.9 \times 10 {}^{4} j$


Gain in P.E.=Work done
=
$4.9 \times 10 {}^{4} j$