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11. A body travelling with speed of 20 km/hr applies brakes and reduced to 10km/hr in 3 min. Calculate the acceleration of the body.

Answer»

Givenu = 20 km/ hv = 10 km/htime = 3 min. convert in hr. 3/60 =0.05 hr.solutionA =

A = v - u / t10 - 20 / 0.05 = -200 km/h



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