EF 151 Exam #2  Spring, 2014 Page 1 of 6


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1 EF 5 Exam #  Spring, 04 Page of 6 Name: Secion: Inrucion: Pu your name and ecion on he exam. Do no open he e unil you are old o do o. Wrie your final anwer in he box proided If you finih wih le han 5 minue remaining, pleae ay eaed unil he exam i oer. Sop work immediaely when ime i oer; pa exam o he aile; ay eaed unil all exam are colleced. Turn in your equaion hee wih your examinaion Guideline: Aume 3 ignifican figure for all gien number unle oherwie aed Show all of your work no work, no credi Include uni for all anwer and direcion for all ecor
2 EF 5 Exam #  Spring, 04 Page of 6. (3 p) Which FBD i correc for a ball flying in he air a hown? (D=drag, W=weigh, N=normal) A B C D 0 m/. (3 p) A plane wan o fly due ouh from Knoxille o Tallahaee. There i a wind blowing in he direcion of 30 S of W. Which graphical ecor addiion diagram i correc? (P: plane, A: air (wind), G: ground) N A B C D 3. (3 p) Which FBD i correc for a peron hrowing a book up and o he righ? (Peron iolaed, before releaing he book, W=weigh, N=normal, P=puh, F=fricion). A B C D 4. (3 p) Which of Newon law of moion explain why you need o wear a ea bel? A. Fir Law B. Second Law C. Third Law 5. (3 p) Which of Newon law of moion ae ha heaier objec require more force for a gien acceleraion? A. Fir Law B. Second Law C. Third Law
3 EF 5 Exam #  Spring, 04 Page 3 of 6 6. (3 p) A car on wheel i rolling a a conan elociy. Which aemen MUST be rue? A. F fricion = 0 B. F ne = 0 C. F fricion = µ k*n D. F fricion = µ *N 7. (3 p) Joh wan o lide a box of porfolio acro a leel floor. He puhe wih a horizonal force P a hown. The box ar liding a = 3 econd. Wha can you ay abou he acceleraion (a) of he box a = 4 econd? A. a = 0 B. a = conan, poiie C. a = conan, negaie 8. (3 p) When we looked a including drag in projecile moion, wha aumpion wa made when calculaing he change in poiion oer a mall change in ime? A. No horizonal acceleraion B. No erical acceleraion C. Conan elociy D. Conan acceleraion E. No drag 9. (6 p) An EF 58 uden wan deermine he required launch peed of a projecile required o hi hi profeor on he op of he head. Help hem ou by howing hem he correc alue for he rajecory equaion. DO NOT ole! Be ure o work in conien uni. x0 = x = y0 = y y an x x x x Launch ube 0 0 an 0 g Launch poin 0 y = θ = g =
4 EF 5 Exam #  Spring, 04 Page 4 of 6 0. (4 p) A ki jumper ake off from a ramp a hown. She hi he ground.9 econd laer. Deermine he alue for he horizonal diance (d) of her jump. (aume ideal projecile moion). (4 p) Deermine he coefficien of kineic fricion beween a 4 lb curling one and he ice if he one ar wih a peed of f/ and i op afer liding 78 f. (FBD=KD required) h=96 f a a a ag
5 EF 5 Exam #  Spring, 04 Page 5 of 6. (4 p) A 500 lb an i pulling a railer of an unknown weigh. The railer wheel roll freely and he drie (racion) force for he an i 600 lb and he yem accelerae from 0 o 60 mph in 8 econd. Wha i he force in he connecion beween he an and he railer during hi ime? (FBD = KD required) 3. (4 p) An airplane ake hr o fly beween Knoxille, TN and Enerprie, AL. The plane can fly 75 mph in ill air. The direcion of he wind i due ouh. How fa i he wind blowing? N W Knoxille, TN E 400 mile 0 S Enerprie, AL
6 EF 5 Exam #  Spring, 04 Page 6 of 6 4. (4 p) Joh i uing a rope (parallel o he incline) o ry and lide a box up an incline. The box doen moe. Wha i he maximum fricion force? Wha i he magniude and direcion of he acual fricion force? (FBD required) Fmax= 0 lb Facual= 3 µ = 0.50 µk = 0.35
EF 151 Exam #1, Spring, 2009 Page 1 of 6
EF 5 Exam #, Spring, 009 Page of 6 Name: Guideline: Aume 3 ignifican figure for all given number unle oherwie aed Show all of your work no work, no credi Wrie your final anwer in he box provided Include
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