A ventilation fan has blades 0.25 m in radius rotating at 30 rpm.What is the tangential speed of each blade tip?
A) 0.02 m/s
B) 0.52 m/s
C) 0.79 m/s
D) 20 m/s

Question

Quizplus · Accepted Answer

Given, 
Radius of the blade, r = 0.25 m
Rotational speed, ω = 30 rpm
Tangential speed of the blade tip, V = rω
Substituting the values, we get
V = 0.25 * 2π * 30 m/s = 0.79 m/s
Therefore, the tangential speed of each blade tip is 0.79 m/s, which is given in option C.

A Ventilation Fan Has Blades 0