This is the question(16) I am going to talk about.
The Attempt at a Solution
I drew a Free Body Diagram for this question.Here,The red mark shows the point on the rope at which the monkey applies the force(10a).
So for the block to move up T<10a+10g and T>15g.
So,At the red mark
10(a+g)-T=10*a (Net Acceleration).........(i)
And for the block,
T-15g=15*a (Net Acceleration).................(ii)
So I have successfully find two equation.
What should I do next to get the final answer?
I will be thankful for help!
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