10. An object with weight W is dragged along a horizontal plane by a force acting along a horizontal plane by a force acting along a rope attached to the object. If the rope makes an angle e with the plane, then the magnitude of the force is F = µ sin 0 + cos 0 where u is the coefficient of friction a. Find the rate of change of F wrt 0. b. The value of 0 at maximum or minimum value of F.

10. An object with weight W is dragged along a horizontal plane by a force acting along a horizontal plane by a force acting along a rope attached to the object. If the rope makes an angle e with the plane, then the magnitude of the force is F = µ sin 0 + cos 0 where u is the coefficient of friction a. Find the rate of change of F wrt 0. b. The value of 0 at maximum or minimum value of F.