The wagons wheel revolves at 45 revolution per minute. the radius of the wheel is 30cm. what its linear velocity?

1 Answer
Gió
May 10, 2018

I got #1.4m/s#

Explanation:

You know the radius so you can evaluate the circumference (the length of the rim) of your wheel as:

#C=2pir=2*3.14*30=188.4cm=1.884m#

this corresponds also to the linear distance described by the wheel during one revolution.
We have #45# revolutions (each one of length #C#) each minute (each minute formed by #60# seconds) so we can write:

#v_"linear"=45*1.884/60=1.4m/s#

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