A block of mass 5kg is placed on a rough horizontal plane whose coefficient of friction is 0.3. Find the least horizontal force needed to move the block along the plane and the resultant of normal reaction and the force applied.

A block of mass 5kg is placed on a rough horizontal plane whose coeffi

1.	A block of mass 5kg is placed on a rough horizontal plane whose coefficient of friction is 0.3. Find the least horizontal force needed to move the block along the plane and the resultant of normal reaction and the force applied.
Answer» SOLUTION :`R=SQRT(F^(2)+N^(2))=sqrt(mu_(s)^(2)m^(2)g^(2)+m^(2)g^(2))=sqrt(((0.3^(2)xx5^(2)+5^(2))9.8^(2))=51.5N`. `tantheta=F//N=0.287theta_(1)` `theta=16^(@)`