Q16 of 35 Page 143

An object of 100kg is accelerated uniformly from a velocity of 5m/s to 8m/s in 6 seconds. Calculate the initial and final momentum of the object. Also, find the magnitude of force asserted on the object?

Let, initial velocity = 5m/s = u

final velocity = 8m/s = v


mass = 100kg = m


Initial momentum = mu = 100kg × 5m/s


= 500 kgm/s


Final momentum = mv = 100kg × 8m/s


= 800 kgm/s


According to Second law of motion



= (800–500)/6


= 300/6


= 50N


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