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postfan
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Homework Statement
A box of mass M is at rest on a horizontal table. The coefficient of static friction between the box and the table is k. The box is connected by a taut string to a block of unknown mass m , initially held horizontally as shown and then released. The box begins to slide at the instant the block reaches the bottom point of its swing. Find the mass m of the block.
Homework Equations
The Attempt at a Solution
I took the force of gravity, mg, and set it equal to the friction force between the box and the table, kMg, getting m=k*M.