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Minimum force required to move a body on a rough horizontal surface. Please somebody explain. How we got this?

Minimum force required to move a body on a rough horizontal surface. Please somebody explain. How we got this?

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Grade:11

1 Answers

Agrata Singh
208 Points
5 years ago
Any body will move on a rough surface if it is able to overcome the force of friction which opposes relative slipping
The max force friction can apply is equal to uN where u is the coefficient of friction and N is the normal rxn force on the body in a dirxn perpendicular to the dirxn in which friction acts.
It is given by R in your illustration.
 
Hence minimum force reqd to move the body should be greater than friction force or greater than uR

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