lab1985S

# lab1985S - Physics 221-Spring 1985 Laboratory Final This...

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Unformatted text preview: Physics 221-Spring 1985 Laboratory Final This laboratory final consists of 8 questions, each worth 1/2 point toward your total score for the course. I 87. What is the distance between the jaws of the vernier caliper shown below? main \$<Lal6 ngqmm uermcw Stale ’ ‘ ' . ‘_ ,2 q ‘ E _. . , .2...» ﬁ',‘l'f'1“jl';:;'1lz.l_,~ or»: {7 W m WW 'Jl‘HH' 'z';';':';£Hlimllm or 3,Q.,")cm_ | 1° 1o 20 so u so2 so 10 so 90 10 BE “IIIllllllllllllllllllilllllll LlthlnllI'HIH'IIII‘IMIMW WIN: I‘IHIllilllllllllllllluluuh ‘ ‘ ‘. q_1 : 3“; s s I _o r _ ~ '_-_"_'f" . «W »_ I .’ H . B. 32.7 cm C. 60.7mm D. 3.027 cm E. 3.1 cm 88. The sequentially numbered spark marks shown at the right record the position of an object; these data were taken using a spark generator operating at 10 Hertz. What was the magnitude of the average velocity (in cm/s) of the object while it traveled the interval from mark #1 to 15400-100 mark #6? A. 7.5 B. 9.0 C. 4.5 D. 10.0 E. O w ’0! “S V ‘_‘ £:)< (if;CDWM /‘ 1V? /U“ '3 ‘_"' z: ' :3 ‘v L/nw S ': sﬂ%ﬁE Physics 221-885-Final Page 89. Two metallic electrodes, located at x = -2 cm and x = +2 cm, are held by wire connections at electric potentials of 0 and 4 volts, . respectively. For the coordinate system shown, .A ,AV to“ which of the following expressions most nearly »f “‘“W‘ ““' 33 ,p” represents the electric potential, V(x,y), in ‘ the air between the plates? (Assume units of volts and cm for V and x, respectively.) A_ V = x—z B. V = (x+2)2/4 c. v = 2 D. v = x : hm) am x dampen + 90. A piece of dry ice can slide with little friction on the surface shown. Assume the dry ice is released at various points corresponding to different values of h with the resulting final velocity v along the level lower surface measured in each case as shown below. h v (cm) (cm/s) 5 99 __ 10 140 15 171 How w0uld you plot this data to test the predictions of Newton's laws and perhaps extract a value for the local acceleration due to gravity? A. plot v versus h .Lm‘u'ﬂ‘ 1: W3 A!“ B. plot v versus h2 3‘ 7- k C. plot h versus v f71' = Q. A (E) plot v versus v’h "yr: ‘3 .5 C W; WC: “3: E. It really does not matter much; any of the a ove plots would be equally useful. 91. Using the rotating wheel apparatus such as you used in lab, 3 second disk is dropped concentrically upon the wheel as it is rotating freely. Which of the following graphs best represents the angular velocity of the wheel vs. tﬁne before, during, and after the disk is dropped? u) Lb .. A U) B (D C. k) (::::> E: Physics 221-885-Final page 92. @773 A large gold fish from Lake LaVerne is suspended from two load cells as shown. If the left cell reads 50 lbs, what can you say about the reading of the right cell? (Assume the cells have been "zeroed" properly.) cannot say without knowing the weight of the fish. cannot say without knowing the weight of the chair, chain and fish. it should be about 71 lbs. it should be about 35 lbs. it should be about 50 lbs. A. B E. 93. 94. vm=0wagxgmgov> : 50 am)... fo-Q €02?) (M\S®=—32. 27-:- —3") Wk . END 'PKT : (+50—3QB‘3 H C/mls A chair with small wheels is free to oscillate back and forth with little friction. The period, T, is expected to be related to the total mass, M, of the chair and its contents by the relation \ “[1 Sir— [NJ/bk 33'. Representative data and a line drawn to 5'. I 2mm“. 1- K” ‘/7. represent the trend of the points, are 3' T: plotted in the graph at the right. What st: 7-77 .1) value of the spring constant, K, is tﬂ/7, ,5 indicated by this data? (in N/m) ¥< * (3n? 2' f‘ (:A. 990) B. 0.20 c. 31 D. 5.0' . The graph shown is not useful for determining K. , 2. K: sir/0428]}: "L Consider two air pucks, each with a mass of 1.0 kg, that collide on a glass . 300 surface such as used in lab. If the spark marks left after the Collision by - the Spark generator operating at 100 Hz are as shown at the right, what is the ’ .x component of the total momentum of the —*r—-—-—-— two pucks after the collision (in Kg'cm/s) A. +50 c. D. +89 ‘ E. 0 -39 ...
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## This note was uploaded on 03/26/2008 for the course PHYS 221 taught by Professor Herrera-siklody during the Spring '08 term at Iowa State.

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lab1985S - Physics 221-Spring 1985 Laboratory Final This...

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