Question

A Bob of mass m is attached to one end of the rod of negligible mass and length r,
the other end of which is pivoted freely at a fixed centre O as shown in figure. what inital speed must be given to the object to reach the top of the circle?(hint: use law of conservation of energy). ​

Answer 1

Explanation:

1/2 m v ^2 = mg h

here h = 2r

hence v =2 √ rg

Answer 2

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