Ch. 3 Homework, Phy 131, Fall 1997, Tulane

3.10  (a) 5.8   theta=31 deg
      (b) 12.2  theta=-35 deg
      (c) 5.4   [theta=33 deg, phi=236 deg, optional]

3.15  Ax/|Ay| = Bx/|By|, i.e., Vectors A and B are reflections of each other
                               about x-axis

3.20  (a) 2 i + 2 j (m/s)    (b) 2.2 i + 2.2 j (m/s)

3.22  (a) 0     (b) -2gt = -19.6 m/s    (c) a=g=-9.8  m/s^2, constant

3.26  (a) 0.8 m/s   (b) 1.8 m/s     (c) 20 deg up stream

3.31  (a) 2290 m   (b) 43.2 s     (c) 9160 m

3.36  8.3 m/s^2, upward

3.41  (a) 2 i -8.5 j  m/s^2   
      (b) Vx = 1 + 2t m/s,   Vy = 11 - 8.5t m/s
      (c)  x = 4 + t + t^2 m, y = 3 + 11t -4.25 t^2 m