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? A point at the end of a propeller has a centripetal acceleration of 532.6 m/s^2. If the velocity of the propeller at this point is 35 m/s, how long is the propeller blade?
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@Shadow
|dw:1516670034581:dw|
so C
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@Nnesha @Vocaloid
wha formula did you use? and how did you get 1.9m?
i used the one in the pic
alright so how did you setup the values ?
like this
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9.8=35^2/532.6
\[9.8 \cancel{=}35^2/532.6\]
\[\frac{ (35)^2 }{ 532.6} \cancel{=} 9.8\]
0.13
a = v^2/r in this case a is the centripetal acceleration given in the problem, v is the velocity of the propeller (also given) and you must solve for r
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532.6=35^2/r
awesome, now solve for r
2.3
good, so D
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