You hold a 1.80-N softball in your hand as shown in the fiqure. Consider your forearm and hand to be a uniform rod with a mass of 1.65 kg and the distance between the elbow joint and the ball in your hand is 2L = 22.0 cm. Your biceps exerts an upward force of 13.5 N on the forearm and is attached at a distance of d = 2.20 cm from the elbow. Bicеps Mg (a) Using the elbow joint as the axis of rotation, determine the magnitude of the net torque acting about the elbow due to the forearm, hand, and ball. N.m (b) In which direction will the forearm and hand rotate, if the net torque obtained in part (a) is nonzero? O counterclockwise

Principles of Physics: A Calculus-Based Text
5th Edition
ISBN:9781133104261
Author:Raymond A. Serway, John W. Jewett
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Chapter10: Rotational Motion
Section: Chapter Questions
Problem 14OQ: A rod 7.0 m long is pivoted at a point 2.0 m from the left end. A downward force of 50 N acts at the...
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You hold a 1.80-N softball in your hand as shown in the figure. Consider your forearm and hand to be a uniform rod with a mass of 1.65 kg and the distance between the elbow joint and
the ball in your hand is 2L = 22.0 cm. Your biceps exerts an upward force of 13.5 N on the forearm and is attached at a distance of d = 2.20 cm from the elbow.
Bicеps
Mg
(a) Using the elbow joint as the axis of rotation, determine the magnitude of the net torque acting about the elbow due to the forearm, hand, and ball.
N- m
(b) In which direction will the forearm and hand rotate, if the net torque obtained in part (a) is nonzero?
O counterclockwise
O no rotation
O clockwise
Transcribed Image Text:You hold a 1.80-N softball in your hand as shown in the figure. Consider your forearm and hand to be a uniform rod with a mass of 1.65 kg and the distance between the elbow joint and the ball in your hand is 2L = 22.0 cm. Your biceps exerts an upward force of 13.5 N on the forearm and is attached at a distance of d = 2.20 cm from the elbow. Bicеps Mg (a) Using the elbow joint as the axis of rotation, determine the magnitude of the net torque acting about the elbow due to the forearm, hand, and ball. N- m (b) In which direction will the forearm and hand rotate, if the net torque obtained in part (a) is nonzero? O counterclockwise O no rotation O clockwise
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