A12-tooth gear is turned two times. how many times will the 24-tooth gear that it is connected to turn

If the gears are perfectly coupled and they don't slip or grind,
then the number of teeth that pass on both gears in some amount
of time are equal.

-- If the 12-tooth gear makes 2 revolutions, then 24 teeth
pass the point where the gears meet.

-- 24 teeth is all the way around the second gear, so
that one revolves one time.

 

Answer: it will take   4.36 seconds to reach her average velocity 10.69 miles/hour.explanation:   we have equation of motion ,where s is the displacement, a is the acceleration, u is the initial velocity and t is the time taken.average velocity = displacement/ time taken.average velocity = 10.69 miles/hr = 10.69*1.6*1000/(60*60) = 4.75 m/s4.75 = s/ts = 4. 1we also have acceleration = 2.18 m/s², initial velocity = 0 m/sso it will take   4.36 seconds to reach her average velocity 10.69 miles/hour.

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