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Lakhmir Singh Solutions Class 9 Physics Solutions for Exercise in Chapter 4 - Work And Energy

Question 42 Exercise

A car is being driven by a force of 2.5 1010 N. Travelling at a constant speed of 5 m/s, it takes 2 minutes to reach a certain place. Calculate the work done.

Answer:

Force, F = 2.5\times10^{10} N

Velocity, v = 5 m/s

Time, t = 2 minutes = 120 s

Distance, s = vt = 600m

Work done, W = Fs = 15\times10^{12} J

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