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A small sphere is attached to a cord and rotates in a vertical circle about a point O. If the average speed of the sphere is increased, the cord is most likely to break at the orientation when the mass is at
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- bottom point B
- the point C
- the point D
- top point A
Correct Option: A
In the case of a body describing a vertical circle,
| T - mg cosθ = | ; T = mg cosθ - | |||
| l | l |
Tension is maximum when cos θ = + 1 and velocity is maximum
Both conditions are satisfied at θ = 0° (i.e. at lowest point B)
