Answer:
The acceleration is 5km/h
Explanation:
Given
Initial Velocity (u) = 30km/h
Final Velocity (v) = 50km/h
Time (t) = 4h
Required
Determine the acceleration
This question will be answered using the first equation of motion;
[tex]v = u + at[/tex]
Substitute values for u, v and t
[tex]50 = 30 + a * 4[/tex]
[tex]50 = 30 + 4a[/tex]
Subtract 30 from both sides
[tex]50 - 30 = 30 - 30+ 4a[/tex]
[tex]20 = 4a[/tex]
Divide both sides by 4
[tex]\frac{20}{4} = \frac{4a}{4}[/tex]
[tex]5 = a[/tex]
[tex]a = 5[/tex]
Hence;
The acceleration is 5km/h
