Physics, 19.11.2019 20:31 bobiscool3698
The outstretched hands and arms of a figure skater preparing for a spin can be considered a slender rod pivoting about an axis through its center. when the skater's hands and arms are brought in and wrapped around his body to execute the spin, the hands and arms can be considered a thin-walled hollow cylinder. his hands and arms have a combined mass of 8.00kg . when outstretched, they span 1.80m ; when wrapped, they form a cylinder of radius 25.0 cm. the moment of inertia about the axis of rotation of the remainder of his body is constant and equal to 0.350kg*m2. if the skater's original angular speed is 0.450rev/s , what is his final angular speed?
Answers: 1
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You are driving to the grocery store at 20 m/s. you are 110m from an intersection when the traffic light turns red. assume that your reaction time is 0.50s and that your car brakes with constant acceleration. how far are you from the intersection when you begin to apply the brakes? what acceleration will bring you to rest right at the intersection? how long does it take you to stop after the light changes? the known values: vi=20m/s xi=110m t=.50s vf=0m/s xf=0m a=?
Answers: 3
The outstretched hands and arms of a figure skater preparing for a spin can be considered a slender...
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