(a) y = (1/2)gt^2
= (1/2) (9.8 m/s^2) (0.450 s)^2 = 0.992 m
(b) x = vt = (1.70 m/s) (0.450 s) = 0.765 m
(c) still 1.70 m/s
(d) v = v0 + at = 0 + (-9.8 m/s^2)(0.450 s) = -4.41 m/s
(e) sqrt(1.7^2 + 4.41^2) = 4.73 m/s
(f) arctan (-4.41/1.7) = -68.9 degrees, i.e., 68.9 degrees below horizontal
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