Question

Which of the following examples represent (nearly) simple harmonic motion and which represent periodic but not simple harmonic motion?
(a) the rotation of earth about its axis.
(b) motion of an oscillating mercury column in a U-tube.
(c) motion of a ball bearing inside a smooth curved bowl, when released from a point slightly above the lowermost point.
(d) general vibrations of a polyatomic molecule about its equilibrium position.

Answer 1

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SIMPLE HORMONIC MOTION :-

when a body does to and fro motion about a fixed point where

x is very very small

** repeated after a definite time

**almost along a straight line in which
F directly proportion to -x

***motion of simple pendulum for small displacement.

PERIODIC MOTION:-

¤ repeated after definite time.

1.periodic motion.

2.SIMPLE HORMONIC MOTION

3.PERIODIC

4.SIMPLE HORMONIC MOTION

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