First slide

Applications of SHM

Question

If a hole is bored along the diameter of the earth and a stone is dropped into hole

Easy

A

The stone reaches the centre of the earth and stops there
B

The stone reaches the other side of the earth and stops there
C

The stone executes simple harmonic motion about the centre of the earth
D

The stone reaches the other side of the earth and escapes into space

Solution

The stone execute S.H.M. about centre of earth with time period $T = 2 π \sqrt{\frac{R}{g}};$ where R = Radius of earth.

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