Question: A medium pace bowler bowls at a speed of 90 km/h. If mass of the ball is 160 g, how much energy will be spent to completely stop it?
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Answer:
50 joules
Explanation:
Given:-
velocity = 90km/hr = 90 * 1000/3600
= 25 m/s
mass = 160g = 160/1000 kg
Kinetic Energy = 1/2m*v^2
= 1/2*(160/1000) * (25)^2
= 50 joules
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