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A small ball (of negligible size) is pla...

A small ball (of negligible size) is placed over a sphere of same mass and radius 1 m as shown. All surface are smooth. A slight push is given to the ball. When the radius vector joining the ball makes an angle of `30^(@)` with the vertical, speed of sphere is `v. (g = 10 m//s^(2))`
If mass of ball and sphere be 1 kg each then the normal reaction between the two at this instant is ltBRgt

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