to the forearm. Ignoring the effect of gravity and any frictional forces, determine the magnitude of the force M needed to give the dart a tangential speed of 4.5 m/s in 0.14 s, starting from rest.
to the forearm. Ignoring the effect of gravity and any frictional forces, determine the magnitude of the force M needed to give the dart a tangential speed of 4.5 m/s in 0.14 s, starting from rest.
University Physics Volume 1
18th Edition
ISBN:9781938168277
Author:William Moebs, Samuel J. Ling, Jeff Sanny
Publisher:William Moebs, Samuel J. Ling, Jeff Sanny
Chapter10: Fixed-axis Rotation
Section: Chapter Questions
Problem 10.5CYU: Check Your Understanding What is the moment of inertia of a cylinder of radius R and mass m about an...
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Question
Transcribed Image Text:Multiple-Concept Example 10 reviews the approach and some of the concepts that are pertinent to this problem. The figure shows a
model for the motion of the human forearm in throwing a dart. Because of the force M applied by the triceps muscle, the forearm
can rotate about an axis at the elbow joint. Assume that the forearm has the dimensions shown in the figure and a moment of inertia
of 0.062 kg-m? (including the effect of the dart) relative to the axis at the elbow. Assume also that the force M acts perpendicular
to the forearm. Ignoring the effect of gravity and any frictional forces, determine the magnitude of the force M needed to give the
dart a tangential speed of 4.5 m/s in 0.14 s, starting from rest.
0.28 m
Axis at elbow joint
0.025 m
Number
i
Units
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