Question

A small pebble tied at one end of a string is placed near the periphery of a circular disc, at the center of which the other end of the string is tied to a peg. The disc is rotating about an axis passing through its centre.
(a) What will be your observation when you are standing outside the disc? Explain.
(b) What will be your observation when you are standing at the centre of the disc. Explain.

April 5, 2024

Answer

(a) The pebble seems to move in a circular path when we are sitting outside the circular disc.

(b) The pebble seems to be stationary in front of us when we are standing at the centre of the disc.

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