A ventilation fan has blades 0.50 m long rotating at 20 rpm.What is the centripetal acceleration of a point on the outer tip of a blade?

Question

Quizplus · Accepted Answer

The centripetal acceleration of a point on the outer tip of the blade can be calculated using the formula: 
a = rω², 
where r is the radius of the blade (which is equal to the length of the blade) and ω is the angular velocity of the blade in radians per second. 
Converting 20 rpm to radians per second:
ω = (20/60) * 2π = 2.09 rad/s
So, a = (0.50 m) * (2.09 rad/s)² = 2.18 m/s²
Rounding off to one significant figure: 
a ≈ 2.2 m/s² 
Therefore, the answer is B.

A Ventilation Fan Has Blades 0