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NEET-XII-Physics

P1 year:2019

with Solutions -
Qstn# 2 Prvs-QstnNext-Qstn
  • #2
    A mass m is attached to a thin wire and
    whirled in a vertical circle. The wire is most
    likely to break when:
    (1) the mass is at the highest point
    (2) the wire is horizontal
    (3) the mass is at the lowest point
    (4) inclined at an angle of 60° from vertical
    digAnsr:   3
    Ans : ( 3 )
    Sol.
    m2 png
    ``T -mg = \frac{mu^2}{L}``
    ``T = mg + \frac{mu^2}{L}``
    The tension is maximum at the lowest
    position of mass, so the chance of breaking is
    maximum.