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Unformatted text preview: Test #1 DYNAMICS Name: ‘ 1) The block weighs ‘50 lbs and lame instant shown has a, Velocity of 20 ﬁ/s down the inclined surface. _
The “coefﬁoie‘nt of kinetic friction between the block and the inclined surface is 0.20. The drag forco .' FD 3 0.5V, Where FD is in pounds and V is in fds. Find: a) the expressioxi for the aooel‘eratioﬁbf the
block, b) velocity of the block after 5 seconds, c)the distance the block moVes during the ﬁrst 5
seconds that thodra'g force is acting, d) the .tefminal velocity of the biosk. $1,; I W V ' BOXIN YOUR ANSWERS Q v1“: e flﬁéié}? 0"“! ﬁll“f:
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A) 060 ‘  Q..— 2) An anti aircraft gun ﬁres a sheli at 500 m/s at an angle of 34°. At t m 0 a plane traveling at constant ' 15%: U [pr,5 C 800 km/h pagses point as shown. Find: a) what time of ﬁring will the gun shellhitrthé plane,
' ' ' ‘ V b)‘how‘far is the plane from the gun emplacement whenif is hit; 0) Speed of the shel'i‘just beforé it
hits the plane, (1) raéius of curvature of the shall at t =3 seconds. ' ' _. BOX IN YOUR ANSWERS w gxc” £5,356,331}: *1,”
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d it r {9 F ‘ M 4‘ /; cw yr ﬂA’O , 3) Cat A is on a straight level highway traveling at a constant speed. Car B is exiting the highway at ‘ 50 mph and decreasing the speed at 2 ft/é’.‘ Car A is’being ﬁlmed at C. The camera at C must 7
(_ ' ‘  rotate at the rate of 0.12 rad/s to follow the car. At the instant shown, Find: a) speed of the ear; b) the rate at which the angular velocity is changing, c)_the relative velocity of B with respect to A, cl)
the relative acceleration of B with respect to A. H.533" j? “l . . 3,. I JILI J _ 9' o 1
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“4.... 4) The IOO’kg block A is connected to a 25 kg block B by the pulley and cable arrangement shown.
If the system is releaSed from rest, Find: a) the tension in the cable, ’0) the Velocity ofB after 3 seconds, 0) velocity of A after it has moved 1.2 in. ‘Box IN YOUR ANSWERS fat} c m}; " $7335? 5’1“? *7 M.‘ x  . ‘ [a3 2}; r I I if ...
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This note was uploaded on 02/27/2012 for the course EGN 3443 taught by Professor Unknown during the Winter '08 term at University of South Florida  Tampa.
 Winter '08
 Unknown
 Dynamics

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