EGM3400 Test 2A redo solution Spring 2010

EGM3400 Test 2A redo solution Spring 2010 - ' ‘ 4.:- 7 1...

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Unformatted text preview: ' ‘ 4.:- 7 1 _ EGM 3400/3401 Spring 2010 Exam 2 a ‘ ~ 090 Name 54 mi 4,31 Please draw a box around all your final answers on all problems. BE SURE T 0 SHOWMA GNITUDE AND DIRECTION F0 ALL VECTOR QUANTITIES. When complete, sign the honor pledge. 5 f; f t Ffin my honor, I have neither given nor received unauthorized aid on this test. Signature \1. Ball B is hanging from an inextensible cord. An identical ball A is released from rest when it is just touching the cord and drops through the vertical distance hA = 16 in. before striking ball B. Assume e = 0.9 and‘no friction. 1a) (5 points) What is the angle between the cord and the normal axis just prior to impact? The normal axis is a line drawn through the centers of the balls. 1c) (5 points) Draw a diagram for ball A showing total velocity, normal velocity, and tangential velocity both before and after impact. On the diagram, also Show all impulses during the collision. \ VA VA,’ 7 1d) (5 points) Draw a diagram for ball B showing total velocity, normal velocity, and tangential velocity both before and after impact. On the diagram, also show all impulses during the collision. .* TN; i l EGM 3400/3401 Spring 2010 Exam 2 1e) (5 points) What is the velocity of ball B just after impact? F b / ml!me = WA" we — Wanna + avg 0) l \ V V3fl_VAAI: C(Vfin'%A> VBY"_ VR/MQ ) vhzvkma Vim! VBWI~ 3V“ VB [ma “‘3 VA waé CZ) sabjhéi; (a nm+s CD 0 I (Ve’me - 3Vnca>e>14~9 — Vnz/wve +'\/.v/ ,- Va I(M6M€i+l\ eU/r meme 1* Vim/we Vfit/z Vfl-t 1 V7! M6 , i V; = 3V4 6039/4416 +V4mem9 ‘ (“1&1qu “kl/iii _\ Mze-H l % +‘ \lgllé.oclq-£l5l ' 1i) (5 points) What is the maximum vertical displacement in inches in; of ball B? . a ‘ lgfilflv 1 Tfim‘rvfil ‘1 /\)blZ‘l:© 3 O*/6ll‘5 L l - ‘VLl i Q,oa144 /' ,3 «B- v «E ‘ m : mw ...
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EGM3400 Test 2A redo solution Spring 2010 - ' ‘ 4.:- 7 1...

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