Question

The blade of a fan whose radius is 30m takes 2s to complete one rotation. What is its speed? ​

Answer 1

Answer:

94.2 m/s

Explanation:

The distance travelled by the end of the blade = 2.π.r

r ==> radius ==> 30 m

Distance travelled = 2 × 3.14 × 30 = 188.4 m

time taken ==> 2 seconds

Speed = Distance / time taken

==> 188.4 / 2 ==> 94.2 m/s

Thus, the speed of the Fan => 94.2 m/s

But remember the motion is Circular (Uniformly)

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