Question

please do both problems 17,18. show work and equations please. thanks in advance

17. - 4 POINTS SERCP117.3.P.009. MY NOTES | ASK YOUR TEACHER respectively. The respective rotational seeds are 47 remin and 4,120 r/min. Calculate the speeds of The diameters of the main rotor and tail rotor of a single angeblicopter are 7.5 the tips of both rotors. main rotor Compare these speed with the speed of sound, 343 m/s Need Help? Welch 18. -11 POINTS SERCP117.3.P.010. MY NOTES ASK YOUR TEACHER The tub of a washeroes into its spin-dry code, starting from rest and reaching a n washer. The tublows to rest in 110. Through how many revolution does the d turn forews in BDSM is point, the person this tea m crant an in the laundry opens the lid, and a safety switch turns off the t ion while it is starting and stopping Need Help?

Answer 1

17. 'V = wr; Wmain= 447 dev/min - 447x21 sadlec drain = 7.53 2 POD - - Wmain smain = 447*211 x 7 GO I speed of tip of main rotor = 176.24 mis Wtail = 4120 merline 4128x 21 radis Stail a losm V = speed of tip of tail rotor z Wiel Stail = 4120x211 x 1.03 - 2 26-51m 16 to dig t=8s a t= 19 sec wow Oneuls wo= brev/s Wig = 0 rev/sec 0,= revolutions from tos to t=&s Dis w.t + ,t? Zs 8 S + 01c 0+ }(3)()2 = 24 vev Oz= revolution from t=&s to t=lasec dan sehingga 0-6 arabec - Mov? Oz= Wot & 1 azt² 02- 6x11 + ļ16) (103? 2 - 0-6 rev/sec 1 Ilsec Q = (66-33)rer =33 rew so total revolution = o to = 24 rert 39 dev = 57 rev. Scanned with CamScanner