The right-angle rule (or square) depicted in Fig. 5-7 hangs at rest from a peg as shown.

Question:

The right-angle rule (or square) depicted in Fig. 5-7 hangs at rest from a peg as shown. It is made of a uniform metal sheet. One arm is L cm long, while the other is 2L cm long. Find (to two significant figures) the angle θ at which it will hang. 0 90-0 YL FR 0 L/2 A 0 L 2 yL Fig. 5-7 0 L