First slide

Vertical circular motion

Question

A ball of mass ‘m’ is rotated in a vertical circle with constant speed. The difference in tensions at the bottom and horizontal positions would be

Easy

A

6 mg
B

5 mg
C

2 mg
D

mg

Solution

T₁ - mg = mu² / l ................. (1)
and T₂ = mu² / l.........................(2)
.: T₁ - T₂ = mg

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