State which of the following situations are possible and give an example for each of these:

(a) An object with constant acceleration but zero velocity: Possible. Example – A ball thrown upwards momentarily stops at the highest point of its trajectory due to gravity, having zero velocity while experiencing constant acceleration.

(b) An object moving with acceleration perpendicular to its direction: Possible. Example – A car moving eastwards turns left, experiencing centripetal acceleration perpendicular to its velocity, enabling circular motion.