08_P60InstructorSolution - 8.60 Model Visualize Solve...

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8.60. Model: Assume the particle model for a sphere in circular motion at constant speed. Visualize: Solve: (a) Newton’s second law along the r and z axes is: 2 12 sin30 sin60 t r mv FT T r = 1G 2 cos30 cos60 0 N z T F + ° = Since we want , TTT == these two equations become () 2 sin30 sin60 t mv T r °+ ° = ( ) cos30 cos60 Tm g Since sin30 sin60 cos30 cos60 , °= ° 2 t t mv mg v rg r =⇒ = The triangle with sides
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