The linear momentum of a body increases uniformly from to in
PHYSICS · Single correct · A Level · Physics · Mechanics and materials · Mechanics and materials
Problem
The linear momentum of a 2kg body increases uniformly from 4kg m s−1 to 14kg m s−1 in 5s. Which one of the following statements about the net force acting on the body during this interval is correct?
(a) Its magnitude is zero.
(b) Its magnitude changes with time, but its direction remains fixed.
(c) It has constant magnitude and constant direction.
(d) Its direction changes continuously though its magnitude is constant.