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The tube AC forms a quarter circle in a vertical plane. The ball B has an area of cross-section slightly smaller than that of the tube, and can move without friction through it. B is placed at A and displaced slightly. It will 

(a) always be in contact with the inner wall of the tube 

(b) always be in contact with the outer wall of the tube 

(c) initially be in contact with the inner wall and later with the outer wall 

(d) initially be in contact with the outer wall and later with the inner wall

1 Answer

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Best answer

Correct Answer is: (c) initially be in contact with the inner wall and later with the outer wall

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