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49. Acar of mass 1500 kg is mevirng with a velocity oi 60 kmtr1, The work done by ts brakes to brinrg t torest is(1) 208.42 k(3) 112,42 Jwork done by its brakes to ring it o e l(2) 198,52(4) 212.52

Answer»

Velocity = 60km/h = 60*5/18 = 16.66

work done = change in K.E = 1/2*(1500)*(16.66)² = 208166.7 J = 208.2 KJ

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