Question

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

• A. When the mass is at the height point of the circle
• B. When the mass is at the lowest point of the circle
• C. When the wire is horizontal
• D. At an angle of $co{s}^{-1}\left(1/3\right)$ from the upward direction

Answer 1

Answer: (B)

When the mass is at the lowest point of the circle

When the mass is at the lowest point.

Explanation ⇒ The Force acting on the Particles will be maximum in case of the Vertical circle when the Force acting will be in the direction of its tension force of string.

When this situation arises then,

Tension $\left(T\right)=\frac{m{v}^2}{r}$

∴ Force will be maximum at this position and there will likely be more chances to break.

This case will be there when the mass is at the lowest position.

∴ Option (b). is correct.