Quiz7CSol - !"#$%%#&'(')*+,'! DL section _...

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Unformatted text preview: !"#$%%#&'(')*+,'! DL section _ Last 6 digits of student ID ______ Grade: 05/18/11 Last name , first name: ________________ ________________ First three letters of your last name ___ !"#$""%&#"'#(")*&+#,-./0.-)"'&#12+#34"5#-..#6"0'#5"'%#$*."5+#7(&5*'&#-."(*#58..#'*/*89*#("#/'*:8); N N !N -external " #t = Net Angular Impulseexternal = #$%&%'() -=rF %#'.'/0+12+345677'8+495':+71'+7'032;2+4<'1531=>+76';4:?';2'2+@6' )#<#=>#&?#A;7';4<*5;0'@3B @642*@'@8(#<#A#B#&';4:';4<*5;0'86531+29'C8(#<#AA#)0'(&DE8(#'.2')#<#FA+>>#&'93*'766'2A;2' 2A066'6C2604;5'/30167'D7A3>4'+4'2A6'/+<*06E';12'34'2A6':+71'/30';'#)#<#>+>=#&#'F3*'@6;7*06' 2A6';4<*5;0'86531+29';2')#<#FA+>=#&';4:'93*'/+4:'2A;2'CG8(#<#AA#)0'(&DE8('D1531=>+76E#'F3*' =43>'2A;2'2A6'@;<4+2*:6'3/'H=#<#>+F#!#G*2'93*':3'432'=43>'2A6'@;<4+2*:67'3/'HF';4:'HA# ;E'H+55'2A6';4<*5;0'@3@642*@'1A;02# IJ Lin Lfin H% HQ HL Nothing changes, Vinyl disc 3.0 J s s o, same L L = 3.0 J s (into the page) GE'H+4:'2A6'@;<4+2*:6'3/'HA#'"0+6/59'6CK5;+4+ If Delta(L) i szero then also the net torque is zero. F_2 has no torque because the arm is zero. F_1 has a counterclockwise torque of 0.2 N x 12 cm F_3 has a clockwise torque with an arm of 4 cm To have zero torque I need - F _3 x 4cm + 0.2 N x 12 cm = 0 F_3 = 0.2cm/4cm x 12 N = 0.6 N L#'.':+860'+7'032;2+4<';7'7A3>4'+4'2A6'/+<*06#'MCK5;+4'+4'346'76426416'>A;2'+7'2A6':+0612+34'3/' 2A6';4<*5;0'@3@642*@# ' ''''' Following the right hand rule the clockwise rotation gives us an angluar momentum directed into the page. 'O1@'''P1@ ...
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