1)A high-speed flywheel in a motor is spinning at 500 rpm when a power failure s
ID: 2195912 • Letter: 1
Question
1)A high-speed flywheel in a motor is spinning at 500 rpm when a power failure suddenly occurs. The flywheel has mass 45.0 kg and diameter 75.0 cm . The power is off for 32.0s and during this time the flywheel slows due to friction in its axle bearings. During the time the power is off, the flywheel makes 150 complete revolutions.At what rate is the flywheel spinning when the power comes back on?rad/s
How long after the beginning of the power failure would it have taken the flywheel to stop if the power had not come back on? s
How many revolutions would the wheel have made during this time? rev
2)An 7.00kg- cylinder, of length 30.0cm and diameter 20.0cm , about the central axis of the cylinder, if the cylinder is thin-walled and hollow. (kg.m^2)
An 7.00- cylinder, of length 30.0 and diameter 20.0 , about the central axis of the cylinder, if the cylinder is solid. (kg.m^2)
Explanation / Answer
( heta = omega t - 0.5lpha t^2) (lpha = 1.43rac^2/s) (0 = omega_0 - plha t; ; t= 36.56) seconds (0 = omega_0^2 - 2plha heta; ; heta = 957.25rad)
Related Questions
Navigate
Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.