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An electric fan rotates 100 times in 50 ...

An electric fan rotates 100 times in 50 s. 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")=(100 xx (2pi r))/(50)`
`=(100 xx 2pi xx 0.5)/(50)=2pi ms^(-1)`
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