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Question

A particle is to slide along the horizontal circle on the inside of a conical funnel as shown. For the execution of this motion the velocity of the particle in terms of r and θ in the Fig. is
759302_230757c68a614f4a81aaeded8a5bd854.png

A
gr tanθ
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B
gr cotθ
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C
gr sinθ
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D
gr cosθ
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