Eduprobe
Question:
A mass m is attached to a thin wire and whirled in a vertical circle. The wire is most likely to break when:
the wire is horizontal
the mass is at the highest point
inclined at an angle of 60° from vertical
the mass is at the lowest point
Solution:
Correct option is D. the mass is at the lowest point
We know that, T - mg = mv²/l ⇒ T = mg + mv²/l
The tension is maximum at the lowest position of mass, so the chance of breaking is maximum.
Hence option D is the correct answer