Question

Kevin, whose mass is 80 kg, is moving along at a velocity of 4 m/s. He doubles his velocity by going down a hill. How much kinetic energy does he have after going down the hill?

Answer 1

The kinetic energy of an object is given by:
Kinetic energy = 1/2 * mass * velocity²

Therefore, if the velocity of an object is doubled, its kinetic energy will increase 4 times. We may verify this mathematically as:

New velocity = 8 m/s

K.E = 1/2 * 80 * 8²
K.E = 2,560 J

The new kinetic energy will be 2,560 Joules