



 
Hi Virginia. I think you were trying to write 2π radians = 1 revolution. Angular speed is the amount of angle through which the engine turns in a given amount of time. In 1 minute, the engine turns around 5000 times, so it has gone 5000 revolutions. Since there are 2π radians in each revolution and 60 seconds in each minute, this is 5000×2π / 60 radians per second. In unit evaluation method, you would write it this way: Hope this helps,  


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