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Home / Doubts and Solutions/JEE/Physics

A load of mass M=100kg is supported is a vertical plane by a string and pulleys .If the free end A of the string is pulled vertically downward with an acceleration a=2m/s^2, the tension in string is

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Asked by m.nilu 25th July 2018, 12:47 PM
Answered by Expert
Answer:
Force diagram for the pulley that is connected to 100 kg block is given in figure.
When the rope at a is pulled down with acceleration 2 m/s2 , the puleey with 100 kg block also moves up with acceleration 2 m/s2.
 
If we account all the foces acting on the pulley that is connected to 100 kg block and if T is tension in the string, then
 
we have ( 2×T - M×g ) = M×a or T = (M/2)×(a+g) = 50×11.8 = 590 N
Answered by Expert 25th July 2018, 2:41 PM
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