2. An automobile accelerates from zero to 36.72 m/s in 6.80 s. The wheels have a diameter of 0.450 m What is the average angular acceleration of each wheel?
3. Convert 2 600 rev/min to rad/s
4. A grindstone spinning at the rate of 8.3 rev/s has what approximate angular speed?
2)
Acceleration, a = (v - u)/t = (36.72 - 0)/6.80 = 5.4 m/s^2
Angular acceleration, alpha = 5.4/(0.45/2) = 24 rad/sec^2
3)
2600 rev/min = 2600 x 2 pi/60 = 272.27 rad/sec
4)
8.3 rev/sec = 8.3 x 60/2 pi = 79.26 rpm
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