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The prop. blade of an airplane is 2.80ft, and rotates @ 2200 r/min. What is the linear velocity of a point on the tip of the blade?
 5 months ago
 5 months ago
The prop. blade of an airplane is 2.80ft, and rotates @ 2200 r/min. What is the linear velocity of a point on the tip of the blade?
 5 months ago
 5 months ago

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zpupsterBest ResponseYou've already chosen the best response.1
Use \[v=\omega(r)=\theta/t(r)\] \[\theta = 2\pi rad\] t= 1 rev r = .5(2.8)
 5 months ago

Bbambino1976Best ResponseYou've already chosen the best response.0
so them telling me the length of the blade holds no grounds?
 5 months ago

wolf1728Best ResponseYou've already chosen the best response.1
Will have to look up how to calculate linear velocity.
 5 months ago

Bbambino1976Best ResponseYou've already chosen the best response.0
all I could find was angular velocity , and after about 2 hours on a simple problem hat
 5 months ago

ehumanBest ResponseYou've already chosen the best response.0
isnt linear velocity the speed of the circumference?
 5 months ago

Bbambino1976Best ResponseYou've already chosen the best response.0
I know there's a relationship between the two.
 5 months ago

wolf1728Best ResponseYou've already chosen the best response.1
I found this: The formula for finding linear velocity is v = x / t. The x variable is distance traveled, and t is the time it took to travel the distance x. The v variable is the linear velocity. radius = 1.4 feet If prop rotates at 2,200 rev/min that equals 36.666 rev for every second Each turn of the prop means that the tip has traveled 1.4 *2*PI = 8.7964594301 feet Multiplying this by 36.666 rev per second equals 322.54 feet per second.
 5 months ago

wolf1728Best ResponseYou've already chosen the best response.1
The distance from the prop center to the tip is half of 2.8 or 1.4 for each turn of the prop the tip must travel 1.4*2*PI feet.
 5 months ago

Bbambino1976Best ResponseYou've already chosen the best response.0
so we take 2.80 and multiply in 1/2, that gives us half the blade length which is 1.4 ft. is that 1.4x2xpie?
 5 months ago

wolf1728Best ResponseYou've already chosen the best response.1
which equals 8.7964594301 feet
 5 months ago

Bbambino1976Best ResponseYou've already chosen the best response.0
now is that ft per second?
 5 months ago

wolf1728Best ResponseYou've already chosen the best response.1
eventually it is feet per second. At this point we are only determining the distance traveled  which is 8.796 feet
 5 months ago

Bbambino1976Best ResponseYou've already chosen the best response.0
persistence pays off i found my page
 5 months ago

Bbambino1976Best ResponseYou've already chosen the best response.0
I'd like to thank ehuman and wolf1728, I couldn't have done it without you!
 5 months ago

Bbambino1976Best ResponseYou've already chosen the best response.0
wait what am I talking about, im not done here.
 5 months ago

zpupsterBest ResponseYou've already chosen the best response.1
(2200revs/min)(2 pi rad/rev)(1.4ft)=? that is the equation you need
 5 months ago

zpupsterBest ResponseYou've already chosen the best response.1
compare it to what i gave you before
 5 months ago
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