Question

A block of mass 2kg is hanging with the help of a light string which is passing over a pully the tension in string will be​

Answer 1

Answer: 4(g +g/2)-t=4a...(1)

t-2(g+g/2)=2a...(2)

Therefore,

t-3g=2a=>t=3g+2a. Solving eqn 1from eqn (2),

4(g+g/2)-(3g+2a)=4a=>3g=6a=>a=g/2

Hence,

t=3g+2(g/2)t=40N

so the right answer is 40N

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