Question

(I) Approximately what magnitude force, $F_M$, must the extensor muscle in the upper arm exert on the lower arm to hold a 7.3-kg shot put (Fig. 9-71)? Assume the lower arm has a mass of 2.3 kg and its $_{CG}$ is 12.0 cm from the elbow-joint pivot.

Name: i approximately what magnitude force fm must the extensor muscle in the upper arm exert on the lower arm to hold a 73 kg shot put fig 9 71 assume the lower arm has a mass of 23 kg and its cg is 12 2
Uploaded: 2021-08-19T23:47:33-08:00
Duration: 3 min 15 s
Channel: Pritesh Ranjan
Description: i approximately what magnitude force fm must the extensor muscle in the upper arm exert on the lower arm to hold a 73 kg shot put fig 9 71 assume the lower arm has a mass of 23 kg and its cg is 12 2

          (I) Approximately what magnitude force, $F_M$, must the extensor muscle in the upper arm exert on the lower arm to hold a 7.3-kg shot put (Fig. 9-71)? Assume the lower arm has a mass of 2.3 kg and its $_{CG}$ is 12.0 cm from the elbow-joint pivot.

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Physics: Principles with Applications

Douglas C. Giancoli 7th Edition

Chapter 9

Instant Answer

Solved by Expert Pritesh Ranjan

08/19/2021

Step 1

Given: Mass of lower arm, $m_1$ = 2.3 kg Distance from pivot to center of gravity of lower arm, $r_1$ = 12.0 cm = 0.12 m Acceleration due to gravity, $g$ = 9.81 m/s^2 Torque due to lower arm weight, $\tau_1$ = $m_1 \times g \times r_1$ Show more…

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(I) Approximately what magnitude force, $F_M$, must the extensor muscle in the upper arm exert on the lower arm to hold a 7.3-kg shot put (Fig. 9-71)? Assume the lower arm has a mass of 2.3 kg and its $_{CG}$ is 12.0 cm from the elbow-joint pivot.