Physics (AS & A Level) · May / June 2019 · Paper 13 · Question 11

A picture is suspended from a nail by a single cord connected to two points X and Y on the picture. There is negligible friction between the cord and the nail so that the tension in both sides of the cord is the same. The picture hangs symmetrically, as shown. The tension in the cord is T. The angle between the cord and the vertical is θ on both sides. Which statement is correct?

1. AIncreasing the length of the cord, with points X and Y in the same place on the picture, would reduce the tension in the cord.
2. BMoving points X and Y further apart on the picture while keeping the length of the cord constant would reduce the tension in the cord.
3. CMoving points X and Y to the top edge of the picture while keeping their distance apart constant and the length of the cord constant would reduce the tension in the cord.
4. DThe weight of the picture is equal to T cosθ.

As printed in the paper