- If a bus of 2000 kg is moving with a velocity of 72 kmh
^{–1}, then calculate the kinetic energy. - If in a same bus 4 more passenger of total 250 kg sits, then find the new kinetic energy.

- Given, m = 2000 kg, v = 80 kmh
^{–1}

Kinetic energy, - Now the total mass, m = 2000 + 205 = 2250 kg

New ,