Question

You are trying to move a light fixture into an apartment. There are hooks in the elevator so you hang the fixture on a hook with a chain. You don't want the fixture to touch the walls so you attach a rope to the side and are pulling horizontally as shown, holding the fixture stationary with respect to the elevator. Note 38 degrees chain rope fixture As the elevator ascends verticalily, the magnitude of the force from the chain on the fixture as a function of the vertical position of the elevator, y, is where Fo-176 N and 5.6 m Using the fixture as your system, if the elevator goes from y=0 toy=5.6 m, what is the work done by the force from the chain on the fixture? 490.9 J ipts You are correct. previous l ries Your receipt no. is 158-7951 The force from the horizontal rope as a function of y is where F -108.4 N and y1-5.6 m. Using the fixture as your system, what is the work done by the rope as the elevator moves from y 0 to 5.6 m? 1pts Submit Answer Incorrect. Tries 4/15 Previous Tries

Answer 1

Note that the component of displacement along the direction of force exerted by the rope is zero. This is because displacement of the fixture is along the vertical direction while the force due to the rope on the fixture is along the horizontal. Hence, the net work done by the rope vanishes or it is zero.

zero is the answer.

Let me see what is your comment. Thanks.