Question

A boy weighting 40 kg makes a high jump of 1.5 m.1.What is his kinetic energy at the highest point?2.What is his potential energy at the highest point.?(g=10m/s^2)

Answer 1

Hey.

heighest point is h= 1.5m
1. as boy is in rest there at heighest point so, v =0
so,K E = 1/2 mv^2=0
2. PE= mgh= 40×10×1.5=600 Joules.

Thanks.