A point mass m is suspended from a light thre | vedclass

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(A) When observing the system from a frame of reference that is stationary with respect to the mass $m$,we are in a non-inertial frame. In this frame,

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(A) When observing the system from a frame of reference that is stationary with respect to the mass $m$,we are in a non-inertial frame. In this frame,the mass appears to be at rest,so the net force acting on it must be zero. The forces acting on the mass are: $1$. The tension $T$ in the thread,acting along the thread towards the pivot $O$. $2$. The weight $W = mg$ acting vertically downwards. $3$. The centrifugal force $F = m\omega^2r$ acting radially outwards from the center of the circular path. Since the mass is in equilibrium in this rotating frame,these three forces must balance each other. Looking at the provided options,the correct representation of these three forces is shown in image $18-b87$ (Option $A$). Therefore,the correct option is $A$.

$A$ point mass $m$ is suspended from a light thread of length $l$,fixed at $O$,and is whirled in a horizontal circle at a constant speed as shown. From your point of view,stationary with respect to the mass,the forces on the mass are

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