Two blocks of mass M 1 = 20 kg and M 2 = 12 kg are connected by a metal rod of mass 8 kg . The system is pulled vertically up by applying a force of 480 N as shown. The tension at the mid-point of

Question

Two blocks of mass M 1 ​ = 20 kg and M 2 ​ = 12 kg are connected by a metal rod of mass 8 kg . The system is pulled vertically up by applying a force of 480 N as shown. The tension at the mid-point of the rod is:

TestHub · Accepted Answer

Acceleration produced in upward direction ​ a = M 1 ​ + M 2 ​ + Mass of metal rod F ​ = 20 + 12 + 8 480 ​ = 12 ms − 2 ​ Tension at the mid point T ​ = ( M 2 ​ + 2 Mass of rod ​ ) a = ( 12 + 4 ) × 12 = 192 N ​

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