Question

Which of the following are periodic non-linear motion?

• A. Motion of a mass attached to a vertical spring
• B. Motion of a pendulum bob
• C. Motion of the moon around the Earth
• D. Motion of a train on a curved track

Answer 1

Answer: (B), (C)

The correct options are
B

Motion of a pendulum bob

C

Motion of the moon around the Earth

A motion is said to be periodic if it repeats itself after a regular interval of time. On the other hand, non-linear motion refers to a motion which is not along a straight line.

Motion of a mass attached to a vertical spring is periodic, but it is along a straight line or linear motion. Motion of a pendulum bob and motion of the moon around the Earth, both are periodic as well as non-linear. Motion of a train on a curved track is non-linear, but not periodic.