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Unformatted text preview: l. A cord is wrapped around a homogeneous disk of radius r = 0.5 m and has a mass
of m = 15 kg. If the cord is pulled upward with a force of T = 180 N, determine
a) the acceleration of the center of the disk , aC and
b) the angular acceleration of the disk, OLC. 41:26: T.. mt}: may [80- t§(9.8!)_ Z’qM/‘T
._ . 5,, D
: (2M6: lvr '3 I04
[30('S __ (774
O( 3 7,” (fa/ 2. A 20-lb uniform disk is placed in contact with an inclined surface as shown.
A constant moment M = 7.5 ft lb is then applied. The kinetic coefﬁcient of friction between the disk and incline uk = 0.4. The weight of the link AB is negligible.
Determine a) the angular acceleration of the disk and b) the force in the link AB. 3. A uniform rod of length L = 10 meters with a mass of '50 kg is supported by
a cable at B and a pin at C. The length b : 2 meters. The cable at B suddenly
breaks. Determine at this instant a) the acceleration of the end at B, and b) the reaction (total force in Newtons) on the pin at C. 1c 3 é(50)(10>z + 50(3) = as“.ng
ISA/1C: 50(93l)? = Ion/C
04; :. 1.6% r/S a") 60(930
06: rd: 80.63135 3
:- l3.58 141/“ch 07, I
(.7 + SCH”) ': g" 06y =‘- Soar/me) :
CY : 233.3 N l
+ M Eg:(‘x:o ...
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This note was uploaded on 02/17/2011 for the course MAE 2323 taught by Professor B.p.wang during the Spring '08 term at UT Arlington.
- Spring '08