Answer:
a) [tex]v=20.3m/s[/tex]
b) [tex]a=2.35m/s^2[/tex]
Explanation:
From the exercise we know:
[tex]x_{1}=30m[/tex]; [tex]v_{1}=10m/s[/tex]; [tex]t_{1}=3s[/tex]
[tex]x_{2}=375m[/tex]; [tex]v_{2}=50m/s[/tex]; [tex]t_{2}=20s[/tex]
The formula for average velocity is:
[tex]v=\frac{x_{2}-x_{1}}{t_{2}-t_{1}}[/tex]
a) [tex]v=\frac{375m-30m}{20s-3s}=20.3m/s[/tex]
The formula for average acceleration is:
[tex]a=\frac{v_{2}-v_{1}}{t_{2}-t_{1}}[/tex]
b) [tex]a=\frac{(50-10)m/s}{(20-3)s}=2.35m/s^2[/tex]
