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5.Work, Energy, Power and Collision
medium
એક દળ શિરોલંબ વર્તુળમય ગતિ કરે છે (આકૃતિ જુઓ). જો કણનો સરેરાશ વેગ વધારવામાં આવે, તો દોરી કયા બિંદુ આગળ તૂટશે?
A
$A$
B
$B$
C
$C$
D
$D$
(AIPMT-2000)
Solution
Tension at any point in vertical motion is given by :
$T =\frac{ mv ^{2}}{ l }+ mg \cos \theta$
$\theta=$ angular displacement from lowest point,
$l=$ length of string
$m =$ mass of string
It is clear that tension at the lowest point $(B)$ is greatest than at other points ($A, C , D$ ). If we increase average velocity, tension will increase at lowest point, therefore at point B, string has maximum possibility of break.
Standard 11
Physics
