A mass is suspended from the ceiling by a rope of length . A horizontal force is applied at the midpoint of the rope so that the rope makes an angle of with respect to the vertical axis as shown in the figure. The magnitude of is:
The figure shows: the rope hangs from a hatched ceiling. Its upper half runs from the ceiling attachment point down and to the left to the midpoint of the rope, making with the vertical, and the tension in this upper half is labelled . At the midpoint the horizontal force is applied, pointing to the left. The lower half of the rope hangs vertically from the midpoint down to the block, and the tension in it is labelled .
- A
- B
- C
- D
