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Part A
1. C
2. C
3. B
4. D
5. D
6. D
7. C
8a. A and C
8b. B
8c. B only
8d. C
Part B
1a. v_0x = 20.0 m/s, v_0y = 15.0 m/s
1b. 3.06 s
1c. vertical component of velocity: straight line starting
at (0 s, +15.0 m/s) and sloping downward to (3.06 s, -15.0 m/s)
horizontal component of velocity: straight horizontal line (zero
slope) at +20.0 m/s over all times (0 s to 3.06 s)
2a. two vectors only: F_g (weight) vector pointing downward
(toward center of Earth); and F_engine vector pointing upward
2b. F_engine = m*g + m*a = 3.3 x 10^7 N
2c. 3.2 x 10^2 s (or 5.4 min)
2d. 6.2 x 10^2 m/s
2e. C
2f. C