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Force, motion and friction

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Find , the constant force with the least magnitude that must be applied to the board in order to pull the board out from under the box (which will then fall off of the opposite end of the board).

Express your answer in terms of some or all of the variables M1 ,M2 , Us ,g , and L.

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Solution Summary

The problem has been solved in detail using the concept of pseudo force. The variable terms are expressed.

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Solution

Relative to an accelerated frame of reference, an object appears to experience an inertial force (also known as pseudo force) in a direction opposite to the direction of acceleration of the frame of reference and its magnitude is equal to the product of the mass of the object and the acceleration of the frame of reference.
R=m1g

Fp Coefficient of static friction μs
f m1 f
m1g ...

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