3-20
a) a_x=0 m/s²
a_y= -9.8 m/s²
b) At t=0: v_x= 7.55 m/s; v_y= 9.33 m/s
At t=end: v_x= 7.55 m/s; v_y= -11.05 m/s
c) 15.70 m
d) Shot not thrown from y₀=0.
e) y₀=1.79 m
f) Drawings. I can show you these in the problem session.

3-34
a) magnitude of acceleration is 0.819 m/s²
direction is 52 degrees above horizontal
b) Drawings. I can show you these in the problem session.

3-44
a) v = ( 1 + 1/3 alpha t³ ) i + ( 7 + beta t - 1/2 gamma t² ) j
r = ( t + 1/12 alpha t⁴ ) i + ( 7t + 1/2 beta t² - 1/6 gamma t³ ) j
b) 341 m
c) Drawing. I can show you this in the problem session.
d) 38500 m

3-60
a) 6.91 m
b) Drawings. I can show you these in the problem session.
c) No.

3-64
A proof I can show you in the problem session.