State which of the following situations are possible and give an example for each of these: (a) an object with a constant acceleration but with zero velocity (b) an object moving with an acceleration but with uniform speed (c) an object moving in a certain direction with an acceleration in the perpendicular direction
(a) Possible When a ball is thrown up, at the highest point, it has zero velocity, although it will have constant acceleration due to gravity, which is equal to 9.8 m/s2. (b) Possible When a car is moving in a circular track with constant speed, it is accelerating due to change in direction of motion. (c) Possible A car is moving in a circular track, its acceleration is perpendicular to the direction of motion.
