Question: An object with weight P is dragged along a horizontal plane by a force acting along a rope attached to the object. If the rope

An object with weight P is dragged along a horizontal plane by a force acting along a rope attached to the object. If the rope makes an angle t with the plane, then the magnitude of the force is F= cP/csint+cost were c is a constant called the coefficient of friction. Let P=30lb and c=0.5. when(in radians) is the rate of change of F with respect to t equal to zero?

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