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Angular speed and number of revolutions per minute of a car moving at 65 mph and diameter of wheels in 2.5 feet?
Wiki User
∙ 13y ago
There are 728.3 revolutions per minute, and the angular speed is 4576 radians per minute.
This is how you get these answers:
(a). Revolutions per minute.
1. Find the circumference of the circle. C= piX Diameter. In this case, C=7.8539816
2. Turn 65 mph into minutes/ft. Thus, 5280ft = 1 mile. 65X5280= 343200 ft. per hour. 1 hr = 60 minutes. 343200/60 = 5720 ft. / per minute.
3. Finally, divide. 5720/7.8539816 = 728.29 = 728.3.
(b). Angular speed = central angle/time = Theta/t
1. 728.3 rpm. Now, since 1 revolution = 2pi, then, (728.3)(2pi) radians per minute. Your answer should be 4576.043859. Round to 4576 radians per minute, and you are done!!
Wiki User
∙ 13y ago
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