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€ Chrome File Edit View History Bookmarks People Window Help 100% Sat 11:08 PM a Hww10 JJ5521 c Chegg Intertia times angular acce C https:/ ne /www.webassign t/web/Student/Assignment-Responses/submit?dep-11654274#Q8 EE: Apps A&M; organizations TCC Miscellaneous PT WTC Lu Hot Schedules Onli 5. C+ 2 points I Previous Answers OSColPhys1 0.4.027 My Notes Ask Your Teacher A bus contains a 1500 kg, 0.600 m radius flywheel a disk) and has a total mass of 10000 kg (a) Calculate the angular velocity the flywheel must have to contain enough energy to take the bus from rest to a speed of 21.0 m/s, assuming 80.0 of the rotational kinetic energy can be transformed into translational energy 142.9 ad/s (b) How high a hill can the bus climb with this stored energy and still have a speed of 2.50 m/s at the top of the hill? 20.5 X m Explicitly show on paper how you follow the steps in the Problem-Solving Strategy for rotational energy found on page 230 of the textbook. Your instructor may ask you to turn in this work.) Additional Materials Reading 6. C+ 2 points I Previous Answers OSColPhys1 0.4.034 My Notes Ask Your Teacher A softball pitcher throws an underhanded pitch with the arm fully extended (straight at the elbow). The ball leaves the pitcher's hand with a speed of 25 m/s. Assume that the pitching motion originates with the arm straight back and terminates with the arm straight down. Do not ignore gravity.Explanation / Answer
Answer for part (b)
assume the busmoves without slipping
Apply Conservation of energy (total initial energy =energy stored in the flywheel=Iw2/2=2756755.35)
rotational energy of the fly wheel=Iw22/2 + mv2/2 +mgh ; w-angular velocity of the disk. Since I=mr2/2 ; and w1=rw1; w2=rw2; u=21; r=0.6 ; m=10000
m'u2/4+ mu2/2 =m'v2/4 + mv2/2 +mgh ;
Substituting the values g=10ms-2 and m'=1500
h=26.94 m
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