What is the work done to increase the velocity of an object from 36 km/h to 72 km/h, if the mass of the object is 200 kg?
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30 KJ
Explanation:
Final velocity= V= 72 km/h = 20m/s
initial velocity = U = 36km/h = 10 m/s
mass = 200Kg
Work done= Change in kinetic energy
= 1/2 * 200* ( 20^2 - 10^2 )
= 30000 J
= 30 KJ
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