﻿ A small spherical steel ball is placed a little away from the centre of a large concave mirror of radius of curvature R = 2.5 m. The ball is then released. What is the time period of the motion? Neglect friction and take  : Kaysons Education

# A Small Spherical Steel Ball Is Placed A Little Away From The Centre Of A Large Concave Mirror Of Radius Of Curvature R = 2.5 m. The Ball Is Then Released. What Is The Time Period Of The Motion? Neglect Friction And Take

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## Question

### Solution

Correct option is

Let the steel ball be placed at A, a little away from the centre O of a concave mirror of radius of

curvature R (= OC = AC), as shown

in fig. Let ∠ACO = θ. If m is the mass

of the ball, its weight m g acts

vertically downwards at A.

This force is resolved into two

rectangular components:

m g cos θ (which is balanced by the

normal reaction N of the mirror) and m g sin θ (which provides the restoring force F). Thus

#### SIMILAR QUESTIONS

Q1

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