A 30 kg boy sitting on a 10 kg go-kart wants to travel down a hill of height 10 m, starting from rest.

a. What is the initial potential energy of the boy and go-kart together?

b. What is their initial kinetic energy?

A 30 kg boy sitting on a 10 kg go-kart wants to travel down a hill of height 10 m, starting from rest.

a. What is the initial potential energy of the boy and go-kart together?

b. What is their initial kinetic energy?

a. Initial potential (gravitational potential)

Ep=mgh

Ep=(30+10)(9.8)(10)

Ep=(40)(98)

Ep=3920

b. Initial kinetic energy=0 as velocity is 0 (starts from rest) and Kinetic energy is = 1/2mv²