A trap door, of length and width 1.70 m, is held open at an angle of 65.0 with respect to the floor. A rope is attached to the raised edge of the door and fastened to the wall behind the door in such a position that the rope pulls perpendicularly to the trap door. If the mass of the trap door is 19.4 kg, what is the torque exerted on the trap door about the hinge by the rope? Enter a positive value if the torque is in counterclockwise direction and enter a negative value if the torque is in clockwise direction.

_______Nm

The distance from the center of the breastbone to a man's hand, with the arm outstretched and horizontal to the floor, is 1.00m. The man is holding a 9.25-kg dumbbell, oriented vertically, in his hand, with the arm horizontal. What is the torque due to this weight about a horizontal axis through the breastbone perpendicular to his chest?

_________Nm

A light rod is being used as a lever as shown. The fulcrum is 1.20 m from the load and 2.40 m from the applied force. If the load has a mass of 18.0 kg, what forcemust be applied to lift the load?