What force will change the velocity of a body of mass 1 kg from 20 m s^-1 to 30 m s^-1 in two seconds?
What force will change the velocity of a body of mass 1 kg from 20 m s-1 to 30 m s-1 in two seconds?
(A) 1N
(B) 5 N
(C) 10 N
(D) 25 N
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