EF 151 Exam #1, Spring, 2009 Page 1 of 6
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1 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 uni for all anwer Include direcion for all vecor Ue he correc number of ignifican digi in your final anwer Secion: Fron :0 A () Zachary :40 B (3) Zachary :0 C (5) Nahan Back A () Nahan B (4) Shane C (6) Shane Hin: Glance over all problem, ackle he eay one fir Ue reaonablene o guide you Conan acceleraion equaion are given a he boom of each page. Equaion: Area of a circle = πr Volume of a cylinder = πr h Law of Sine inα in β in γ = = a b c Law of Coine c = a b ab coγ β a γ c b α Converion: gallon = 3 cubic inche gallon = 4 quar quar = pin gallon = 8 fluid ounce m 3 = 000 L acre = 43,560 f mile = 580 f mile = 8 furlong fahom = 6 f rod = 6.5 f chain = yard inch = 5.4 mm wa = N m/ec hp = wa hp = 550 f lb / ec lb = 4.45 N m = 000 mm Conan Acceleraion Equaion: v v = v a = = a( ) v v = a
2 EF 5 Exam #, Spring, 009 Page of 6 a. (4p) Find he y componen of he vecor. 3 N y 7 x b. (4 p) Wha i he vecor reul (in i,j noaion) of B A?. A = ( 9i 3 ˆj )f B = ( 4 iˆ 5 ˆj )f c. (4 p) Lane Kiffen oe a fooball raigh up. The fooball heigh i ploed below a a funcion of ime. A wha ime i he fooball velociy zero? d. (4 p) Eabrook ha a wall area of f. Wha i he wall area of a inch= foo cale model? Conan Acceleraion Equaion: v v = v a = = a( ) v v = a
3 EF 5 Exam #, Spring, 009 Page 3 of 6 e. (4 p) Alice and Bob are a he op of a building. Alice hrow her ball downward. Bob imply drop hi ball. If you neglec air reiance, which ball ha he greaer acceleraion ju afer releae? A) Alice ball B) Bob ball C) I depend on how hard he ball wa hrown D) Neiher -- hey boh have he ame acceleraion f. (4 p) Alice and Bob are a he op of a building. Alice hrow her ball downward. Bob hrow hi ball upward. If you neglec air reiance, which ball will reach he ground fir? A) Alice ball B) Bob ball C) I depend on how hard each ball wa hrown D) The will boh reach he ground a he ame ime g. (4 p) Bruce run all he way around a bakeball cour (300 fee) in 30 econd. Which value can NOT be zero? A) Hi average velociy B) Hi average peed C) Hi inananeou peed halfway around D) Hi inananeou acceleraion halfway around. ( p) Prof. Schleer recangular alfalfa field i 80 fee long by 3 meer wide. Calculae he area of he field in acre. A wih all problem, be ure o clearly how all of your work and pu your final anwer in he provided box. Conan Acceleraion Equaion: v v = v a = = a( ) v v = a
4 EF 5 Exam #, Spring, 009 Page 4 of 6 3. ( p) Wha i he magniude of he vecor A - B? 6 f A B 45 f ( p) Dr. Benne i deigning a bridge. A one join he deermine ha here are four force a hown in he diagram. The. on force i horizonal and he 5.5 on force i verical. If hi join i in equilibrium, wha i magniude of force A? B A 33. on 5.5 on Conan Acceleraion Equaion: v v = v a = = a( ) v v = a
5 EF 5 Exam #, Spring, 009 Page 5 of 6 5. ( p) Dr. Arazi i riding her unicycle in a race. She ar from re and accelerae a a conan rae for 5 econd, reaching a op peed of 3.5 m/ec. She hen coninue o ride a ha peed for anoher.5 minue unil he croe he finih line. How far did he ride? 6. ( p) Shane i anding on he edge of a cliff and hrow a rock downward wih peed of 7 f/. The rock hi he ground a he boom of cliff 3.5 econd laer. Wha diance did he rock ravel? (neglec air reiance) Conan Acceleraion Equaion: v v = v a = = a( ) v v = a
6 EF 5 Exam #, Spring, 009 Page 6 of 6 7. ( p) Nae and Zach and 05 f apar a oppoie end of Eabrook. Nae ar from re and run direcly oward Zach wih a conan acceleraion of 3. f/. Zach ar a he ame ime and run direcly oward Nae wih a conan peed of 7.0 f/. How much ime pae before hey collide? Pleae remain in your ea if here are le han 5 minue o go in he exam o a no o diurb hoe ill rying o finih. If you finih early, we ugge you go back and check your work. Conan Acceleraion Equaion: v v = v a = = a( ) v v = a
EF 151 Exam #2 - Spring, 2014 Page 1 of 6
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
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