Question

an object of mass 20kg is accelerated uniformly from a velocity of 36km/hr to 54km/hr in 25 second. calculate the initial momentum and the final momentum of the object. also find the magnitude of force exerted on the object

Answer 1

Initial velocity = 36 km/hr =10 m/s

Initial momentum = m u = 20 x 100 = 200 kg m/s

Final velocity = 54 km/hr = 15 m/s

Final momentum = m v = 20 x 15 = 300 kg m/s

Change in momentum = 300 - 200 = 100 kg m/s

Force exerted = mass x change in momentum / time = 20 x 100 / 25 = 80 N

Answer 2

it is helpful for you but I cannot be help in initial momentum and final momentum thanks for your question