pliss jawab yah no 13 sama 14

13.
[tex]a=\frac{\Delta v}{\Delta t}\\=\frac{14-5}{4,5}\\=2 m.s^{-2}[/tex]

14.
[tex]v_{t}=v_{0}+at\\0=40-5t\\t=8\\\\x=\frac{1}{2}at^{2}+v_{0}t\\=\frac{1}{2}\times (-5)\times 8^{2}+40\times 8\\=-160+320\\=160 m[/tex]