Question

Which of the following is true with respect to an object in periodic motion?

• A. It should be in translatory motion.
• B. The motion of the object repeats after a fixed time interval.
• C. It should be undergoing oscillatory motion.
• D. It should move along a straight line.

Answer 1

The correct option is B

The motion of the object repeats after a fixed time interval.

The motion of the moon around the earth is periodic but it is not an oscillatory motion. Hence, the option A is incorrect. If the motion of the object repeats after a fixed time interval, we can say that the motion is periodic. So, only option B is correct.

The motion of a body with constant speed along a circular track is periodic motion. Hence, options C and D are incorrect.