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A rectangular block is mobing along a fr...

A rectangular block is mobing along a frictionless path, when it encounters the circular loop as shown. The block passes points `1,2,3,4,` before ret runing to the horizontal tracks. At point 3

A

Its mechanical energy is minimum

B

The foeces on it area balanced

C

It experiences a net upward force

D

Its speed is minimum

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The correct Answer is:
D
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