Calculate the kinetic energy of acar of Mass 1000kg moving with avelocity of 72km/hr?

First, we need to convert the velocity from km/hr to m/s:

72 km/hr = 72,000 m/3600 s = 20 m/s

Now, we can calculate the kinetic energy using the formula:

Kinetic energy = 0.5 * mass * velocity^2

Kinetic energy = 0.5 * 1000 kg * (20 m/s)^2
Kinetic energy = 0.5 * 1000 kg * 400 m^2/s^2
Kinetic energy = 500,000 kg m^2/s^2

Therefore, the kinetic energy of the car is 500,000 Joules.