- #1
Edwardo_Elric
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Homework Statement
A model of a helicopter rotor has four blades, each 3.20m in length from the central shaft to the blade tip. The model is rotated in a wind tunnel at 600rev/min. a.) What is the linear speed of the blade in m/s?
b.) What is the radial acceleration of the blade expressed as a multiple of the acceleration due to gravity g?
Homework Equations
[tex] a_{rad} = \frac{V^2}{R}[/tex]
[tex] a_{rad} = \frac{4{\pi}^2R}{T^2}[/tex]
The Attempt at a Solution
a.) convert: 600rev / min ( 1 min / 60secs) = 10 rev / s
Multiplied 3.20m by 10 rev / s = 32.0m/s?
b.) [tex] a_{rad} = \frac{V^2}{R}[/tex]
a_{rad} = (32.0m/s)^2 / (3.20m) = 320m/s^2
i don't understand the radial acceleration of blade expressed as a multiple of g...
is my answers correct?