Question

Which of the following is/are not periodic motion?

• A. The motion of the bob of the simple pendulum
• B. Motion of a bouncing ball under the action of gravity and friction
• C. Motion of a planet around the sun
• D. Both A and B

Answer 1

The correct option is B Motion of a bouncing ball under the action of gravity and friction

A periodic motion is the one which repeats itself at fixed intervals of time.

A bouncing ball doesn't bounce to the same height everytime. Hence we can't say that the motion is repeating.