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Unformatted text preview: Homework 5 Solutions Chapter 8 Review Questions: 2. The speed tangent to the circular path of motion, 90 o to the radius of the path. 6. It is similarly a resistance to the change in motion however, unlike traditional inertia, it is circular not linear motion and therefore a factor of the radius of the circular path. 7. Mass and radius. 15. They are equal. 23. Toward the center 24. Inward 27. You feel like youre being pushed out but outward is your inertial state, it is t he force of your car, string, etc. that is pulling you inward. 30. I = L/ = L/ 32. L = I = I / = 2L or twice Plug and Chug: 1. T = (50N)(0.2m) = 10Nm 2. T = (50N)(0.5m) = 25Nm 3. F c = / = (2kg)(3m/s) 2 /2.5m = 7.2N 4. F c = / = (75kg)(3m/s) 2 /2m = 337.5N 5. L = = (75kg)(3m/s)( 2m) = 450kg m 2 /s 6. L = = (75kg)(6m/s)( 2m) = 900kg m 2 /s Ranking: 4. B, C, A Exercises: 12. A volleyball, the mass and hence the inertia is less. 20. In the vertical position you cannot produce a 90 degree force on the arm but in the horizontal position maximum force occurs 90 degrees to the radius (maximum torque). 30. The center of gravity of the platform produces a force that counters the boys torque....
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