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Unformatted text preview: Name: 2 Mar 11 EM232 Exam 2 PROBLEM 1:
20 Points Given: if the rod of negligible mass is subjected to a couple
moment of M = (30t2) Nm and the engine of the car supplies a
traction force of F = (15t) N to the wheels, where t is in seconds,
determine the speed of the car lat the instant t = S s. The car
starts from rest. The total mass of the car and rider is 150 kg. Neglect the size of the car. FIND: @ ttgﬁ SOLUTION: frat:
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lot [Q + 30»: )0 = éOO’vL zooo  400 «Q [VLz 3.33'H/sl Name: 2 Mar 11 EM232 Exam 2 PROBLEM 2:
40 Points Given: The stone A used in the sport ofcurling slides over the ice and strikes
another stone B as shown. If each stone is smooth and has a weight of 47 lb,
and the coefﬁcient of restitution between the stones is e = 0.8, determine each
stones velocity vectorjnst after collision, Initially A has a velocity of8 ﬁ/s and B is at rest. Neglect friction. ._~, —,
FIND: VAL tvrsl SOLUTION: B:
7 M47
Velocier 'Vecyor—S  MA!"
_..\, l
VA. = (~ 3cos307§ + sum 30 33 W; a t 30.
—'>
S) VAltééoqst Co‘s’giCiC/V‘+ 0'5: “shipHoyt: Omlx valid o‘low LIWL 08' lMPAL‘F
/ :\ & : VBx "‘ VAﬁL :3 : IVER —’\/A7<
W" ‘V'Sx. (5.413 ’V/D'O ~5M5 = m — m G) COVWCVVGU'I'OVI DS— MoMnM‘i" 33m Hu. 575+cv~4 .‘5 comgeuvtai axlongbr'ru GJLl/Mpac‘i'
0 MA IVAK' 4 ; MAVAXL + MrsN/Biz I C‘ é‘lZS’H/sx ’ VA; + ’Vrs>< Q) Z 57 '35 Z QVIIL, izm' Ma’ Mrs fl/ﬁr =  04993 t 5‘7: VB, " ' 6.142 575
Coytyivaom OJ, MomwM a} emu“ 5+0“ ’3 (ongvvcd A\°K$?law¢4 Cot/‘4‘“)? 4,“ I45 MAW/A7. = Mn ’VAYL juice Mass clots “0+ ckautt; / Name: 2 Mar 11 EM232 Exam 2 PROBLEM 3: [I d ’f
40 Points » ‘i Given: The 0.75 kg bob of a pendulum is fired from rest at position A by a spring which has a stiffness of k = 6 kN/m and is compresssed 125 mm. 1 4:
Determine the speed of the bob and the tension in the cord when the bob is at V . h
position C. ’ FIND: m as bob as me P+ a SOLUTION:
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1 L5. = “awn/g + M657, L N Z I
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(O‘BILQMsiN/sz) +7— : (0}5KQ (won“7,31
(’3va gL'XSS) + 7— : 56.05, “\‘N ...
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This note was uploaded on 02/09/2012 for the course MECHANICAL EM232 taught by Professor Zollars during the Spring '11 term at Naval Academy.
 Spring '11
 zollars

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