Final_Exam_f05_v5_So - Physics 112 Final Exam Solutions 1 2(a(a 8.0 cm(b = 2/T = 2(2.0 s = s(c Q =/T =(12 s/2.0 s = 6 = 19-1 Fall 2005 pi pi p2i

Info iconThis preview shows pages 1–2. Sign up to view the full content.

View Full Document Right Arrow Icon
Physics 112 — Final Exam Solutions Fall 2005 1. (a) 8.0 cm (b ) ω = 2 π /T = 2 π /(2.0 s) = π s -1 (c) Q = π ( τ /T) = π (12 s/2.0 s) = 6 π = 19 2. (a) (b) [+3 for any one of the possible methods for each case, -1 for bad or missing labels] 3. (a) E (b) B (c) G (d) C 4. (a) B (b) B (c) F 5. (a) C (b) D 6. (a) H (b) N [+3 for N; +1 for G, H, J, K, L, or M] 7. G 8. (a) or (b) Σ F y = f - mg = ma y = 0 f = mg f 2 + N 2 = (mg) 2 + N 2 = 2mg N = 3 mg f μ s N mg μ s 3 mg (c) Σ F x = ma x N = m v 2 R μ s 1/ 3 = 0.58 v = NR m = 3 mgR m = 3 gR = 1.32 gR 9. (a) (b) About axle: Σ τ = 0 = Mg(0.40 m) - m p g(0.60 m) - N(1.60 m) - Tsin60°(1.60 m) = 0 with N = mg (ball) T = Mg(0.40 m) - m p g(0.60 m) - mg(1.60 m) (1.60 m)sin60° = (20 kg)(0.40 m) - (2.0 kg)(0.60 m) - (0.50 kg)(1.60 m) (1.60 m)(0.866) (9.8 m/s 2 ) = 42.4 N (c) I axle = (20 kg)(0.40 m) 2 + 1 12 (2.0 kg)(2.00 m) 2 + (2.0 kg)(0.60 m) 2 = 4.59 kg-m
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Image of page 2
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 02/14/2008 for the course PHYS 1112 taught by Professor Leclair,a during the Spring '07 term at Cornell University (Engineering School).

Page1 / 2

Final_Exam_f05_v5_So - Physics 112 Final Exam Solutions 1 2(a(a 8.0 cm(b = 2/T = 2(2.0 s = s(c Q =/T =(12 s/2.0 s = 6 = 19-1 Fall 2005 pi pi p2i

This preview shows document pages 1 - 2. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online