Question

19. 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 certain direction with an acceleration in the perpendicular direction.​

Answer 1

All three situations are possible. Their examples are given in the explanation.

Explanation:

a) It is the case when object is thrown in upward direction. When object reaches at highest point, its velocity is zero but it still has constant gravitational acceleration.

b) It is the case of circular motion. In circular motion velocity direction changes but magnitude remains constant. Hence, it is an example of motion with acceleration and constant speed.

c) It is also the case of circular motion. In this case tangential velocity and centripetal acceleration are perpendicular.