Question

An electric fan rotates 100 times in 50 s. If the length of its wing from its axis of rotation is 0.5m, then the speed of particle at the edge of the wing is
(A) 2 π m/s (B) 0.5π m/s (C) π m/s (D) 2 m/s​

Answer 1

Answer:

2π m/s

Explanation:

angular velocity (ω) = revs*2π/t. = 4π rad/s (θ=revs*2π)

radius = 0.5 m

v=ω* radius

=4π*0.5

=2π m/s