Phys180A f07 test1 - "J UNIVERSITY TEST 1 DmECTIONS 0...

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Unformatted text preview: "J UNIVERSITY TEST 1: September 17, 2007 DmECTIONS: 0 You need a narrow red SCANTRON FORM NO. F-289-PAR—L and a No. 2 pencil. - You may not use a pen to darken boxes on the SCANTRON form. - No calculators, notes, or books are allowed. - All cell phones must be turned OFF. No earphones may be worn. - Make no stray marks on the SCANTRON form. - All your bubbled responses must be dark and completely fill the intended box. . Make sure you completely erase any unintended bubbled responses. 1) Print your NAME on the top line of the SCANTRON form. 2) Next to SUBJECT, print Physics 180A — Leduc 3) Next to DATE, print 09 " 17 " 2007 4) Enter your 9-digit RED ID Number in the boxes under ID. NUMBER and then darken the corresponding box under each numeral. 5) Darken the [‘3] box under TEST FORM. 6) Leave EXAM NUMBER blank. Don’t fill in any of the numbered boxes. ‘ 7) Do NOT turn this page or begin the test until you are toldto do so. 8) Choose the one best response to each question and then darken the corresponding box next to the question number on the SCANTRON form. You will only use Items 1 through 12 (on Side 1) for this Test. Hand in only your completed SCANTRON form when the Test is over. Only the completed SCANTRON form will be scored. No credit will be given for anything written on the test pages themselves. TEST FORM 3“ . $62 arr-nu Questions 1 through 4 are worth 5 points each. 1. True or False? If the motion of an object is described by a position vs. time graph, then the object’s displacement is equal to the area between the graph and the time axis (with areas above the time axis counting as positive, and areas below the time axis counting as negative). 2. True or False? If an object’s velocity is negative, then its acceleration is also negative. 4} . True (B false 3. True or False? If an object starts from rest and moves in a straight line with uniform acceleration, then its velocity at any time is obtained by multiplying the acceleration by the travel time. ATrue 0v: % h :5; 6‘15? baftflc 51+ f ”WC 4. True or False? Dividing velocity by acceleration gives displacement. A True 0‘ b j. i : nil? (Omar/1 False Va ‘0“ 7 + "M f. Physics lBOA—Fafl2007—Leduc—TESTIIFORMB—page 1 of5 :{/2V (V 1L Yr.) '1' V : d-SQ lacemeu‘r r at‘i’ *‘W‘f’ Questions 5 through 12 are w—rth 10 —oints each}! ., Vflc Watt -V +2014 Questions 5 and 6: A car travels along a straight road, undergoing uniform acceleration from an initial velocity of S mls to a final velocity of 35 mls, in a time interval of 5 s. ' _ on v. , s 4 5. What was the magnitude of the car’s acceleration during this time interval? Vf _-_ 35 ”/6. A Smfs2 .6m/s2 l», 55 C 5 mls2 D 4m/s2 35: 5 f (1L5) E 3 Inls2 30 :5 5a 9 5 _ IA/ , - . . . . 6K - S; 6. What was the car s displacement durmg tins tune interval? A 200 | ) B ’“ ol= é (*0 (5) 150 In @100,“ 20 (5) D 50 In A __. [O O m E Cannot be determined from the information given 2.0! + : w Physics BOA—Fall 2m7—Lcduc—HTEST l: FORMB—page 2 of5 7. A ball is thrown straight upward with an initial speed of 5 11113. It takes a total of 4 seconds for the ball to reach the ground. Air resistance is negligible. From what height was the ball thrown? A 20m ) _ 7 ' . : (h/ B 40m_ ' I I V. S S C'spm ,. 1': L's '33; I- " V4" 0 , s , ' - m/ _ r , . AMI-O s- Mme» 2O "" (30) r-leUm 8. A rock is dropped from the roof of a tall building. If the rock slams into the ground at a speed of 50 m/s, how tall is the building? (Ignore air resistance.) .. A_ 50 m V‘ '5 .125m _ V; _: Sow/5 c 250 111 03625111 ‘ 02 {0'93 E 1250 m s“" Q Physics lSDA-FaIIZOO'I—Leduc—TEST leORMB—page3of5 Questions 9 and 10: An object moves along a straight track. Its velocity (v, in m/s) as a function of time (t, in seconds) is given by the graph of v vs. 1 shown below: 9. What was the object’s acceleration between t = 0 and t = 2 s? A -2 m/s B —O.5 m/s c —o.5 m/s2 @—*2 mls2 E 2 mls2 10. What was the object’s displacement during the time interval from t = 0 to t = 7 s? A8111 0K1: V2101”)? 36m ©4m 02m EOm Physics 180A—Fall2007w1educ—TEST l: FORMB—page4 of S Questions 1 1 and 12: A rock is thrown horizontally with an initial speed of 30 mls from the top of a tall cliff. The rock lands 180 m from the base of the cliff. (Air resistance is negligible.) 11. What was the rock’s speed 4 seconds after it was thrown? 36 ' 5 <1.— 0 '30 m/s 4" 1'“ Q; '0 B 35 m/s f C 40 mls D 50 mls E 70 m/s f x ‘‘‘‘‘‘‘‘ Physics lBOA—Fafl2007——-I..educ-—TEST l:FORMB—-pag;50f5 ...
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