A body of mass m is kept on an inclined plane . The force required to just move a body up the inclined plane is double the force required to just prevent the body from sliding down the plane. If the coefficient of friction is mu, what is the inclination of the plane ?

A body of mass m is kept on an inclined plane . The force required to

1.	A body of mass m is kept on an inclined plane . The force required to just move a body up the inclined plane is double the force required to just prevent the body from sliding down the plane. If the coefficient of friction is mu, what is the inclination of the plane ?
Answer» Solution :`(mgsintheta)+mu mg COSTHETA)=2(mg sintheta-mu mg costheta)`, `3mu=tantheta`, `theta=tan^(-1)(3mu)`