Question

A car has a mass of 1 TON its velocity increases from 0 to 90 kmph in 10 sec.Find force acting on it.
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Answer 1

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Initial velocity    u=30 km/h=30×185=325 m/s

Final velocity    v=60 km/h=60×185=350 m/s

Mass   m=1500 kg

Work done   W=21mv2−21mu2

⟹ W=2m(v2−u2)=21500×((350)2−(325)2)=156187 J