Ch. 7 Homework, Phy 131, Fall 1997, Tulane

Note: ^ denotes power, eg. x^2 = x*x, i.e. x squared 
7.1   0.23 m

7.5   CM = 52.5 i + 22.5 j  (cm), relative to the lower left corner.

7.8   Vcm = 3 i - 1.5 j  (m/s)

7.9   Vcm = 4 i  (m/s)

7.12  4.5 m/s

7.13  1.5 m/s, to the left

7.21  0.65 m/s

7.42  (a) a = 0.5 m/s^2
      (b) F = 960 N

7.46  (a) 9 i - 2 j  (m/s)
      (b) Vcm = 6 i  (m/s)
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