A force is required to kep a body in uniform motion in a straight line.
Comments.Kindly refer to the link given below for an answer to a similar query :
https://www.meritnation.com/ask-answer/question/why-the-force-is-not-required-to-move-a-body-uniformly-along/laws-of-motion/7854557
https://www.meritnation.com/ask-answer/question/why-the-force-is-not-required-to-move-a-body-uniformly-along/laws-of-motion/7854557