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Physics - Circular Motion Question with Solution | TestHub

PhysicsCircular MotionDynamicsMedium2 minQB

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A simple pendulum of length l and mass m is initially at its lowest position. It is given the minimum horizontal speed necessary to move in a circular path about the point of suspension. The tension in the string at the lowest position of the bob is

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Solution:

Minimum speed to complete the vertical circle is $u = 5 g l$ .
At the lowest point: $T - m g = \frac{m u ^{2}}{l}$
i.e. $T - m g = 5 m g$ ,
so $T = 6 m g$ .

Stream:JEESubject:PhysicsTopic:Circular MotionSubtopic:Dynamics

⏱ 2mℹ️ Source: QB

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