Problem 11.84 Part A An amusement park ride consists of airplane-shaped cars att
ID: 1796258 • Letter: P
Question
Problem 11.84 Part A An amusement park ride consists of airplane-shaped cars attached to steel rods (Fiqure 1). Each rod has a length of 16.6 mand a cross-sectional area of How much is the rod stretched when it is vertical and the ride is at rest? (Assume that each car plus two people seated in it has a total weight of 1870 N.) Express your answer with the appropriate units. 8.00 cm2. Submit My Answers Give Up Incorrect; Try Again; 5 attempts remaining Part B When operating, the ride has a maximum angular speed of 11.0 rev/min. How much is the rod stretched then? Express your answer with the appropriate units. Submit My Answers Give Up Incorrect; Try Again; 5 attempts remaining Provide Feedback Continue Figure 14 of 1Explanation / Answer
1. Young's modulus = (F/A)/ (del L / L) = 200 x 10^ 9
F = 1870 N
L = 16.6 m, A = 8 cm^2 = 8 x 10^-4 m^2
del L = F*L / A* Y = 1.94 x 10^-4 m
2. Total force = 1870 + mw^2*r
m = 1870/9.8 = 190.8
w = 11 rev/min = 1.15 rad/sec
Total force = 6058.7 N
del L = 6.29 x 10^-4 m