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Q.

If   ar  and  at represent radial and tangential acceleration respectively, the motion of a particle will be circular if

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a

ar=0  and  at=0

b

ar=0  and  at≠0

c

ar≠0  and  at=0

d

ar≠0  and  at≠0

answer is C, D.

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Detailed Solution

In uniform circular motion, at=0, but in non-uniform circular motion, at≠0. In both cases, ar≠0.

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