Question

A ball rolling on the ground in a straight line has
(a) rectilinear motion.
(b) rectilinear and rotational motion.
(c) rectilinear and curvilinear motion.
(d) rectilinear and periodic motion.

Answer 1

(b) rectilinear and rotational motion.

A ball rolling on the ground in a straight line undergoes rectilinear motion. It also rotates about an axis passing through the ball. Therefore, it also performs rotational motion.