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in Physics by (73.7k points)

A mass m kg is whirled in a vertical plane by tying it at the end of a flexible wire of length l and area of cross section 'A'. When the mass is at its lowest position the strain produced in the wire is, if Young’s modulus of the wire is 'Y' (if V= 5gl)

(1) AY/6mg

(2) 6mg/AY

(3) 5mg/AY

(4) AY/5mg

1 Answer

+1 vote
by (69.0k points)
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Best answer

Correct option (2) 6mg/AY

Explanation:

When mass is at lowest position tension in wire = 6mg 

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