Part A IP Force to Hold a Baseball A person holds a 1.42-N baseball in his hand, a distance of 34.0 cm from the elbow joint, as shown in the figure(Figure 1). The biceps, attached at a distance of 2.75 cm from the elbow, exerts an upward force of 12.6 N on the forearm. Consider the forearm and hand to be a uniform rod with a mass of 1.30 kg. You may want to review (Page 335) Calculate the net torque acting on the forearm and hand. Use the elbow joint as the axis of rotation. T = - 2.47 N. m Submit Previous Answers Request Answer X Incorrect; Try Again; 7 attempts remaining • Part B If the net torque obtained in part A is nonzero, in which direction will the forearm and hand rotate? O counterclockwise O clockwise Figure 1 of 1 Submit Request Answer • Part C Humerus Biceps Would the torque exerted on the forearm by the biceps increase or decrease if the biceps were attached farther from the elbow joint? 126 N Radius O decrease O increase Ulna 2.75 cm -170 cm Mg 17.0 cm- Submit Request Answer

College Physics
11th Edition
ISBN:9781305952300
Author:Raymond A. Serway, Chris Vuille
Publisher:Raymond A. Serway, Chris Vuille
Chapter1: Units, Trigonometry. And Vectors
Section: Chapter Questions
Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...
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• Part A
IP Force to Hold a Baseball A person holds a 1.42-N baseball in his
hand, a distance of 34.0 cm from the elbow joint, as shown in the
figure(Figure 1). The biceps, attached at a distance of 2.75 cm from
the elbow, exerts an upward force of 12.6 N on the forearm. Consider
the forearm and hand to be a uniform rod with a mass of 1.30 kg
You may want to review (Page 335).
Calculate the net torque acting on the forearm and hand. Use the elbow joint as the axis of rotation.
να ΑΣΦ
?
2.47
N. m
Submit
Previous Answers Request Answer
X Incorrect; Try Again; 7 attempts remaining
Part B
If the net torque obtained in part A is nonzero, in which direction will the forearm and hand rotate?
O counterclockwise
O clockwise
Figure
1 of 1
Submit
Request Answer
• Part C
Humerus
Biceps
Would the torque exerted on the forearm by the biceps increase or decrease if the biceps were attached farther from the elbow joint?
12.6N
Radius
O decrease
O increase
2.75 cm
170 cm
Mg
-17.0 cm
Submit
Request Answer
Transcribed Image Text:• Part A IP Force to Hold a Baseball A person holds a 1.42-N baseball in his hand, a distance of 34.0 cm from the elbow joint, as shown in the figure(Figure 1). The biceps, attached at a distance of 2.75 cm from the elbow, exerts an upward force of 12.6 N on the forearm. Consider the forearm and hand to be a uniform rod with a mass of 1.30 kg You may want to review (Page 335). Calculate the net torque acting on the forearm and hand. Use the elbow joint as the axis of rotation. να ΑΣΦ ? 2.47 N. m Submit Previous Answers Request Answer X Incorrect; Try Again; 7 attempts remaining Part B If the net torque obtained in part A is nonzero, in which direction will the forearm and hand rotate? O counterclockwise O clockwise Figure 1 of 1 Submit Request Answer • Part C Humerus Biceps Would the torque exerted on the forearm by the biceps increase or decrease if the biceps were attached farther from the elbow joint? 12.6N Radius O decrease O increase 2.75 cm 170 cm Mg -17.0 cm Submit Request Answer
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