Question

An object of mass 5 kg is accelerated uniformly from a velocity of 4m/s to 8m/s in 8s. Calculate the initial and final momentum of the object. Also, find the magnitude of the force exerted on the object.
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Answer 1

Explanation:

Hey mate first you have to find the initial and final momentum

Initial momentum (p1)=m1*v1

=5*4

=20kg m/s

Final Momentum(p2)=m2*v2

=5*8

=40kg m/s

Force = p2-p1/t

=(40-20)/8

=20/8

=2.5 N

Ans. The initial momentum is 20 kg m/s, final momentum is 40 kg m/s and the force is 2.5 Newtons.

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Answer 2

refer the attachment above.hope it helps u.