HW 14

# HW 14 - 12.34 A 5.3 Kg cat and a 2.1 Kg bowl of tuna fish...

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Unformatted text preview: 12.34] A 5.3 Kg cat and a 2.1 Kg bowl of tuna fish are at opposite ends of a 4.0-m-long seesaw. How far to the left of the pivot must a 3.6 Kg cat stand ~o keep the seesaw balanced? .:yf&amp;gt; ?' c.. ~I oJ.. te.r-r (L~~'\c:U)~~ (: ')~ w-r&amp;gt;.\$ &amp;quot;r1J\ -::.S&amp;quot;3k~ M Z- ~ ~~'b'i~ ')'Y) f'b-:. '3~~ 2 ,\ ~ ~ {2llJ .J d ~ &amp;quot;r'), FGlt 0&amp;quot;, ~ 3'b ~O &amp;quot;'J.~'&amp;amp;'W)IJ1.. xd ~ ~..3 k~ -X ~'8W)/.j2~ 2.'I&amp;quot;)- 2,,\ r'd Xo;.gW)Js...'f..l. or, d-:: (s'?&amp;gt;r~-~'rA) X~.g'&amp;quot;1IJL &amp;quot;,2~- ~. ~ ~() A~l.- ~'1..'t~ 7'-2W) '3.&amp;quot; ~~-=-1'1-~ ~ ij' 12.29] Starting from rest, a 12-cm-diameter compact disk takes 3.0 s to reach its operating angular velocity of 2000 rpm. Assume that the angular acceleration is constant. The disk's moment of inertia is 2.5 X10'5Kgm2.How much torque is applied to the disk? How many revolutions does it make before reaching full speed? ~c1uY,oJ tf1QS~~0C) '. K-'f)(:;LI.Jf)~' 'Y' ~ ~c.V) I + ~ ~s. ~f ::: .Q.t)a~ YI?r'): 2.a()~ 'f- 2.~ &amp;quot;,CodS-l &amp;quot;I::. 2. S' &amp;quot;1&amp;gt;It) r r'lJ I ~ 1. bY)d -.- L J 'T)(J' ~ &amp;quot;fQ V . 1&amp;quot;'~ e..\N\. oJ-\c.oJ t.e..r~~-\-cL~00 : 0) ~ f ~ We-t 0( C .'.&amp;quot;&amp;quot;[:.1--&amp;lt;. .;,. 2..'\$&amp;quot;'f.. \c;S rl/~1. 'j } ~~ 'X 'D-~ Nt&amp;gt;') b) e ::~-t +-'-~{1....
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HW 14 - 12.34 A 5.3 Kg cat and a 2.1 Kg bowl of tuna fish...

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