Question

A vehicle is moving with a velocity of 80kmph. Calculate it's kinetic energy,if the mass of the vehicle is 1000 kg?

Answer 1

MASS = 1000KG

VELOCITY = 80 KM/HR = 80 *5/18 = 400/18 M/SEC

KINETIC ENERGY = 1/2MV²

                               = 1000*400/18*1/2

                               = 11111.111 JOULES

CLEARLY UNDERSTAND THAT, KG KM²/HR IS NOT THE S.I UNIT OF JOULES .