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    				| 1. | Find out the kinetic energy of a car of mass 3000 kg moving with a constantvelocity of 60 km/hr. | 
| Answer» The KINETIC energy is = 400 k J 
 Explanation: The kinetic energy is K E = 1 2 m v 2 
 The MASS is m = 2000 k g 
 The VELOCITY is v = 20 m s − 1 
 So, 1/2 . 2000.2² = 40000j = 400kj | |