There is one mistake in the question as unit of acceleration is not written correctly.The correct question is here
A car traveling at 7 m/s accelerates uniformly at 2.5 m/s² to reach a speed of 12 m/s. How long does it take for this acceleration to occur?
Answer:
time taken =2 seconds
Explanation:
Given Data
Initial Speed Vi= 7 m/s
Final Speed Vf=12 m/s
Acceleration a= 2.5 m/s²
To find
Time taken for this acceleration
Solution
As we know that
Final velocity=Initial velocity + acceleration×time
[tex]V_{f}=V_{i}+at\\ t=\frac{V_{f}-V_{t}}{a}\\ t=\frac{12m/s-7m/s}{2.5m/s^{2} }\\ t=2 seconds[/tex]
So car takes 2 seconds for this acceleration to occur
