e previous3 of 13 1 r s Problem 11.5 Calculate the net torque acting on the fore
ID: 1781426 • Letter: E
Question
e previous3 of 13 1 r s Problem 11.5 Calculate the net torque acting on the forearm and hand Use the elbow joint as the axis of rotation IP Force to Hold a Baseball A person holds a 1 42-N baseball in his hand, a distance of 34.0 em from the elbow joint, as shown in the figure(Egure 1) The biceps, attached at a distance of 2.75 cm from the elbow, exerts an upward force of 12.6N on the forearm Consder the forearm and hand to be a uniform rod with a mass of 1 50 kg N m Submit My Answers Give Up Part B If the not torque oblained in part A is nonzero, in which direction will the forearm and hand rotate? of 1 clockwise O counterclockwise Submit My Answers Give Up Biceps Correct Part C Would the torque oxerted on the torearm by the bicops increase or decrease if the biceps wore attached farther from the elbow joint? 170m 70m O decrease O increaseExplanation / Answer
a) F = 12.6 N, M = 1.5 kg
L = 17 cm = 0.17 m
w = 1.42 N
Net torque = F d - L (M * g) - (2 L) w
= (12.6 * 2.75 * 10-2) - (0.17 * 1.5 * 9.8) - (2 * 0.17 * 1.42)
= -2.63 N.m
c) Decrease
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