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In the arrangement shown in the fig l, the ends p and q of an unstretchable string move downwards with uniform speed u. Pulleys a and b are fixed.mass m moves upward with a speed

Meher , 8 Years ago
Grade 12th pass
anser 1 Answers
Eshan

Last Activity: 7 Years ago

Dear student,

From the figure,

The location of point O can be given as

l^2=a^2+y^2

Differentiating with respect to time,

2l\dfrac{dl}{dt}=0+2y\dfrac{dy}{dt}
\implies l.u=y.v
\implies v=u\dfrac{l}{y}=\dfrac{u}{cos\theta}
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