JEE Main Physics question
A block of mass m is resting on a smooth horizontal surface. One end of a uniform rope of mass m/3 is fixed to the block, which is pulled in the horizontal direction by applying a force F at the other end. The tension in the middle of the rope is
Answer: (D)
Solution
Total mass = m + m/3 = 4m/3; acceleration a = F/(4m/3) = 3F/(4m). The tension at the midpoint of the rope accelerates
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