PHYS
10_InstSolManual_PDF_Part19

# 10_InstSolManual_PDF_Part19 - Dynamics of Rotational Motion...

• Notes
• 1

This preview shows page 1. Sign up to view the full content.

10.53. Set Up: Take the pivot at the shoulder joint and let counterclockwise torques be positive. Let be upward and let be to the right. and are the weights of his upper arm and forearm, respectively. is the weight held in his hand. Solve: (a) The free-body diagram is given in Figure 10.53. Figure 10.53 (b) gives Reflect: The force T from the muscle has a small perpendicular component and a small level arm, so its magnitude is much larger than the total weight being supported. 10.54. Set Up: The only difference from Problem 10.53 is that now the weight of the 2.50 kg object and of the forearm act at the elbow, a distance of 26.0 cm from the shoulder. Solve: gives 10.55. Set Up: The precession angular velocity is 10.56. Set Up: The precession angular velocity is The total mass of the gyroscope is Solve: (a) (b) (c) If the figure in the problem is viewed from above, is in the direction of the precession and is along the axis of the rotor, away from the pivot. 10.57. Set Up: with t 5 5.0 h 5 1.8 3 10 4 s. 2.01 3 10 3 rad / s. v 5 19,200 rpm 5 1.0 3 10 2 6 degree 5 1.745 3 10 2 8 rad. R 5 2.5 3 10 2 2 m. I 5 MR 2 , L S t S v 5 wr I V 5 1 0.165 kg 21 9.80 m / s 2 21 0.0400 m 2 1 1.20 3 10 2
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}

### What students are saying

• As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

Kiran Temple University Fox School of Business ‘17, Course Hero Intern

• I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

Dana University of Pennsylvania ‘17, Course Hero Intern

• The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

Jill Tulane University ‘16, Course Hero Intern