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A ball of mass 'm' is rotating in a circ...

A ball of mass 'm' is rotating in a circle of radius 'r' with speed v inside a smooth cone as shown in figure. Let N be the normal reaction on the ball by the cone .then choose the wrong option.

A

`N = mg cos theta`

B

`g sin theta = (v^(2))/(r)cos theta`

C

`N sin theta - (mv^(2))/(r) =0`

D

None of these

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The correct Answer is:
A
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