Question

A student of mass of 65kg takes 10s to run up a flight of stairs of 40steps. lf each step is 12cm high,calculate the potential energy of the student at a maximum height. take gravity =10m/s2​

Answer 1

Eg=mgh

Eg=gravitational potential energy

m=mass (kg)

g=acceleration of gravity

h=height (m)

m=65kg

g=10m/s²

h=40·12=4.8m

Eg=65(10)(4.8)

Eg=3120J