constant acceleration is defined as time rate change of velocity.
Answer : The average acceleration of the car is [tex]-4.5m/s^2[/tex].
Solution : Given,
Initial velocity = 45 m/s
Final velocity = 0 m/s
Time = 10 seconds
Average acceleration : It is defined as the change in velocity divided by the time.
Formula used :
[tex]a=\frac{\Delta V}{t}=\frac{V_{final}-V_{initial}}{t}[/tex]
where,
a = average acceleration
t = time
[tex]V_{initial}[/tex] = initial velocity
[tex]V_{final}[/tex] = initial velocity
Now put all the given values in this formula, we get the average acceleration.
[tex]a=\frac{(0m/s)-(45m/s)}{10s}=-4.5m/s^2[/tex]
Acceleration is in negative that means the speed of car is slowing down.
Therefore, the average acceleration of the car is [tex]-4.5m/s^2[/tex].
