First slide

Vertical circular motion

Question

A mass m is attached to a thin wire and whirled in a vertical circle. The wire is most likely to break when

Easy

A

inclined at an angle of 60° from vertical
B

the mass is at the highest point
C

the wire is horizontal
D

the mass is at the lowest point

Solution

$T - mg \cos θ = \frac{{mv}^{2}}{R}$
T will be maximum when $θ = 0^{0}$ , When mass is at lowest point.

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