2-8
a) 2.80 m/s
b) 5.20 m/s
c) 7.60 m/s

2-22
a) 32.0 m/s²
b) 2.42 s

2-30
Question is entirely drawing figures. Come to problem session for solution.

2-42
a) 30.6 m
b) 24.5 m/s
c) Figures...

2-48 (cancelled)
a) 2.04 s
b) 6.12 s
c) 8.16 s
d) 4.08 s
e) -9.8 m/s²
f) Figures...

2-64
a) 75 m from t=0 to t=5
-150 m from t=5 to t=20
tot distance traveled = 75+150 = 225 m
b) tot displacement = 75-150 = -75
c) a=6 m/s² from t=0 to t=5
a=1.33 m/s² from t=5 to t=20
d) No. Graph of y vs t cannot be truly vertical. It just has a very steep slope.

2-76
3.6 m