Multiple Concept Example 10 Reviews The Approach And Some Of The Concepts That Are Pertinent To This Problem The Figure 1 (37.33 KiB) Viewed 13 times
Multiple Concept Example 10 Reviews The Approach And Some Of The Concepts That Are Pertinent To This Problem The Figure 2 (30.88 KiB) Viewed 13 times
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 0.056 kg-m² (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 5.7 m/s in 0.14 s, starting from rest. Number Units Axis at elbow joigt 0.28 m 0.025 m
A man holds a 155-N ball in his hand, with the forearm horizontal (see the figure). He can support the ball in this position because of the flexor muscle force M, which is applied perpendicular to the forearm. The forearm weighs 22.3 N and has a center of gravity as indicated. Find (a) the magnitude of M and the (b) magnitude and (c) direction (as a positive angle counterclockwise from horizontal) of the force applied by the upper arm bone to the forearm at the elbow joint. (a) Number (b) Number (c) Number Upper arm bone- Elbow joint 0.0510 mp Units Units Units Flexor muscle 0.0890 m -0.330 m-
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