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Grade 11Mechanics

Sir please solve this problem regarding NLM as soon as possible I will be very thankful to you sir

Question image for Sir please solve this problem regarding NLM as so
Profile image of Aman
7 Years agoGrade 11
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1 Answer

Profile image of Eshan
7 Years ago
Dear student,

The block moves down with speed 2m/s and string is winding with 2m/s. Hence speed at which is string is moving down on the right of the pulley=4m/s.
The velocity of pulley is average of that of string on its two sides.
Hence\dfrac{v-4}{2}=2\implies v=8m/s