Question

a boy of mass 40kgclimbs vertically upwards on a mango tree to a height of 10m.calculate<br />A. the work done by the boy.<br />B. the potential energy gained by the boy (g=10m/s²)

Answer 1

Hiii Friend
As we know that
Work done is equal to product of force applied and displacement of body
Here W= Fcos90°•d
F = 40g d= 10 m along y axis
cos90° = 0 thefore W = 0
P.E = mgh.
=>P.E = 40×10×10
=>P.E= 4000J
Hope it will help You my friend
Have nice day