What is a car average acceleration if it slows down from 22ms to 15.7 m/s in 2.15 s?
(15.7-22)/2.15 m/s^2
= -2.93 m/s^2
The minus sign means that it is decelerating.
To find the average acceleration of a car, we can use the formula:
Average acceleration = Change in velocity / Time taken
Here, the change in velocity is the difference between the initial velocity (22 m/s) and the final velocity (15.7 m/s), which is
Change in velocity = Final velocity - Initial velocity
= 15.7 m/s - 22 m/s
= -6.3 m/s
Note that the negative sign indicates that the car is slowing down, rather than speeding up.
The time taken for the car to slow down is given as 2.15 seconds.
Now, we can substitute the values into the formula:
Average acceleration = Change in velocity / Time taken
= (-6.3 m/s) / (2.15 s)
Evaluating this expression, we get:
Average acceleration = -2.93 m/s²
So, the average acceleration of the car, as it slows down from 22 m/s to 15.7 m/s in 2.15 seconds, is approximately -2.93 m/s².