Question

the force required just to move a body up an inclined plane is double the force required just to prevent the body sliding down If the coefficient of friction is 0. 25 the angle of inclination of the plane

Answer 1

here,F=force to move the body
f=frictional force
A.Q ,F=2f.......1
F=f+mgsin©
2f-f=mgsin©......
u mgcos©=mgsin©
u=tan©.........
tan©=0.25