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In the arrangement shown in the figure, The ends P and Q of an unstretchable string move downwards with uniform speed “v”. Pulleys A and B are fixed. Mass M moves upwards with a speed?

In the arrangement shown in the figure, The ends P and Q of an unstretchable string move downwards with uniform speed “v”. Pulleys A and B are fixed. Mass M moves upwards with a speed?

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Grade:12th pass

3 Answers

Sourabh Singh IIT Patna
askIITians Faculty 2104 Points
4 years ago
The block of mass m is moving up with a speed of 2*v*cos(phi)
Sangram sahoo
11 Points
4 years ago
Let the speed of mass M be v .The point on thread just connected to mass M will also have the same velocity .The component of the v along the thread is v cos θ . That means any point on the thread must be moving with speed v cos θ .As it is given that thread is moving with velocity u .That meansv cos θ = u
Kushagra Madhukar
askIITians Faculty 629 Points
one year ago
Dear student,
Please find the answer to your question.
 
The block of mass m is moving up with a speed of 2*v*cos(ɸ)
 
Thanks and regards,
Kushagra

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