Motion in A Plane

Question: A ball is moving to and fro about the lowest point A of a smooth hemispherical bowl. If it is able to rise up to a height of 20 cm on either side of A, its speed at A must be (Take $g = 10 m/s^2$, mass of the body 5 g)



1) 0.2 m/s
2) 2 m/s
3) 4 m/s
4) 4.5 m/s
Solution: Explanation: Explanation
Non-uniform-circular-motion

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