8. B.
9.
1. F
2. P [tex]s = \frac{at^{2}}{2}[/tex]
3. F
10. 20 m/s
[tex]72\frac{km}{h} = 72\cdot\frac{1000 \ m}{3600 \ s} = 20\frac{m}{s}[/tex]
11.
1. D.
2. C.
3. B.
4. A.
12. 10 m
[tex]v = 5\frac{m}{s}\\t = 2 \ s\\\\s = v\cdot t = 5\frac{m}{s}\cdot2 \ s = 10 \ m[/tex]
