pls give me step by step explaination...
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K1 = (m/2)v12
K2 = (m/2)v22
K2/K1 = (v2/v1)2 = (30/15)2 = 4
Since both have the same mass, the car moving at twice the speed (i.e. the 30 km/h car) has 4 times the kinetic energy as the other car (the 15 km/h car).
deeksha8103:
the ans. says 1:4
wht u done is correct
but the ans. should be in ratio
thanks
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