Answer
(a) A car driving around a curve at constant speed on a flat road does not have a constant velocity because the direction of motion changes.
(b) A car driving straight up an incline at constant speed has a constant velocity because the speed is constant and the direction of motion is constant.
(c) The Moon in orbit around the Earth does not have a constant velocity because the direction of motion changes.
Work Step by Step
(a) A car driving around a curve at constant speed on a flat road does not have a constant velocity because the direction of motion changes.
(b) A car driving straight up an incline at constant speed has a constant velocity because the speed is constant and the direction of motion is constant.
(c) The Moon in orbit around the Earth does not have a constant velocity because the direction of motion changes. The speed of the Moon may also vary somewhat at different points in the orbit.
