A person is trying to lift a ladder of mass 15 kg and length 8.0 m. The person is exerting a vertical force on the ladder at a point of contact 2.0 m from the center of gravity. The opposite end of the ladder rests on the floor.
(a) When the ladder makes an angle of 60.0° with the floor, what is this vertical force?
(b) A person tries to help by lifting the ladder at the point of contact with the floor. Does this help the person trying to lift the ladder? Explain.