Question

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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?

Answer 1

@Shadow

Answer 2

so C

Answer 3

@Nnesha @Vocaloid

Answer 4

wha formula did you use? and how did you get 1.9m?

Answer 5

i used the one in the pic

Answer 6

alright so how did you setup the values ?

Answer 7

like this

Answer 8

9.8=35^2/532.6

Answer 9

\[9.8 \cancel{=}35^2/532.6\]

Answer 10

\[\frac{ (35)^2 }{ 532.6} \cancel{=} 9.8\]

Answer 11

0.13

Answer 12

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

Answer 13

532.6=35^2/r

Answer 14

awesome, now solve for r

Answer 15

2.3

Answer 16

good, so D