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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 forces on it are balanced

C

it is not accelerating

D

its speed is minimum

Text Solution

Verified by Experts

The correct Answer is:
D
Mechanical energy is conserved during the motion. At highest point, kinetic energy is minimum. So, speed is minimum. The block has radial acceleration at top.
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