A Child Applies the Brakes on a Bicycle by Applying

Multiple Choice

A child applies the brakes on a bicycle by applying a downward force of 20 pounds on the pedal when the crank makes a angle with the horizontal (see figure) . The crank is 6 inches in length. Find the torque at P. Round your answer to two decimal places. ​ ​

A) 15.32 ft-lb
B) 7.66 ft-lb
C) 91.93 ft-lb
D) 6.43 ft-lb
E) 12.86 ft-lb