Calculate the kinetic energy of 500kg car travelling at 72km/h

Answer 1

First, we need to convert the speed from km/h to m/s.

72 km/h = 72,000 m / 3,600 s = 20 m/s

Next, we can use the formula for kinetic energy:

Kinetic Energy = 1/2 * mass * (velocity)^2

Kinetic Energy = 1/2 * 500 kg * (20 m/s)^2

Kinetic Energy = 1/2 * 500 kg * 400 m^2/s^2

Kinetic Energy = 100,000 kg * m^2/s^2

Therefore, the kinetic energy of the car is 100,000 Joules.