The drawing shows a lower leg being exercised. It has a 49-N weight attached to the foot and is extended at an angle θ with respect to the vertical. Consider a rotational axis at the knee.
(a) When θ = 90.0°, find the magnitude of the torque that the weight creates.
(b) At what angle θ does the magnitude of the torque equal 15 N ·m?

0.55 m 49 N