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

Answer» Here, `m=100kg, u=5m//s, v=8m//s, t=6 s `
Initial momentum of object, `p_(1)= m u=100xx5=500 kg m//s`
final momentum of object, `p_(2)=mv=100xx8=800kg m//s`
Force exerted, `F = ("change in momentum")/("time taken")=(p_(2)-p_(1))/t=(800-500)/6=50N`


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