ATest+20E

Suppose you have two attached gears, one with 24 sprockets and one with 48 sprockets. When you spin the 24-sprocket gear at 30 rpm, how fast will the other gear spin?



 ANSWER: The 24-sprocket gear will have to go around twice to make the 48-sprocket gear go around once. Therefore, the other gear spins at 15 rpm (one-half the rate of the first).