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An electric fan rotates 100 times in one...

An electric fan rotates 100 times in one second. If the length of its wing from its axis of rotation is 0.5 m . Then the speed of the fan is ______ m `s^(-1)`

A

`100pi`

B

`50pi`

C

`200pi`

D

100

Text Solution

Verified by Experts

The correct Answer is:
A
Radius of the circular path traced by fan = 0.5 m
The number of rotations per second = 100
Speed = `("distance")/("time")=(100xx(2pir))/("1 second")`
= `100xx2pixx0.5`
= `50xx2pi=100pims^(-1)`
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