A particle is moving in a circle: | vedclass

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Question

(A) In circular motion,the acceleration of a particle has two components: centripetal acceleration $(a_c)$ directed towards the center and tangential

Vedclass · Accepted Answer

The resultant force may be towards the centre.

Vedclass · Answer

(A) In circular motion,the acceleration of a particle has two components: centripetal acceleration $(a_c)$ directed towards the center and tangential acceleration $(a_t)$ directed along the tangent.The resultant force $F = ma$ is the vector sum of the centripetal force $(F_c = ma_c)$ and the tangential force $(F_t = ma_t)$.If the motion is uniform circular motion,$a_t = 0$,so the resultant force is purely centripetal (towards the center).If the motion is non-uniform circular motion,$a_t 
eq 0$,so the resultant force is not directed towards the center.Therefore,the resultant force may be towards the center (in uniform circular motion) or at an angle to the radius (in non-uniform circular motion).Option $A$ is correct because it states the force 'may' be towards the center,which covers the uniform case.

$A$ particle is moving in a circle:

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