ch05-p033 - 33. (a) Since friction is negligible the force...

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a F m g g == = 52 013 . .. N 40kg ms 2 (c) The accelerations of the sled and girl are in opposite directions. Assuming the girl starts at the origin and moves in the + x direction, her coordinate is given by 2 1 2 gg x at = . The sled starts at x 0 = 15 m and moves in the – x direction. Its coordinate is given by 2 1 0 2 s s x xa t =− . They meet when g s x x = , or 22 0 11 . gs x This occurs at time t x aa = + 2 0 . By then, the girl has gone the distance () 2 0 2 15 m 0.13 m/s 1 2.6 m. 2 0.13 m/s 0.62 m/s g t = = ++ 33. (a) Since friction is negligible the force of the girl is the only horizontal force on the
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This note was uploaded on 05/17/2011 for the course PHY 2049 taught by Professor Any during the Spring '08 term at University of Florida.

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