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An electric fnas rotates 100 times in 50...

An electric fnas rotates 100 times in 50s . If the blength of its wing from its axis of rotation is `0.5` m, then the speed of particle at the edge of the wing is _________ `m s^(-1)`

A

`2pi`

B

`0.5pi`

C

`pi`

D

2

Text Solution

Verified by Experts

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