Question

what is the difference between the motion of ceiling fan and that of a stone tied to a string and whirled

Answer 1

the rotation speed is not constant in the whirling of stone while when we talk about the rotation of the fan it moves with constant angular speed.

Answer 2

Answer:
So both are examples of periodic motions (ie they move in the same way over and over again after a fixed period), however as Gavin Kanowitz explained the ceiling fan exhibits uniform circular motion, accelerated radially while the pendulum usually experiences radial and tangential acceleration and does not usually demonstrate uniform circular motion. Rather a pendulum usually carves a single arc where it goes at varying speed over the course of the arc. In principle it is possible to put a pendulum into uniform circular motion by applying a perpendicular motion to the pendulum so it orbits around the centre of the pendulum system according to the centripetal acceleration equation (acceleration towards the centre = velocity squared over radius).


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