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| Math Central | Quandaries & Queries |
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Question from Atalie, a student: The engine of a sports car rotates at 5000 revolution per minute. Calculate the angular speed of the engine in radians per second, given that 2pi radians = 1 revolution |
Hi,
The engine of a sports car rotates at 5000 revolution per minute.
How many revolutions per second is that? (Fewer, 'cause a second is shorter)
Calculate the angular speed of the engine in radians per second,
How many radians per second is that? (More than the last answer 'cause there are about six-and-a-quarter radians in each revolution.)
To convert approximately from RPM to radians per second, divide by ten. You can use this rule to check if you multiplied & divided in the right places.
Good Hunting!
RD
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