Answer:-0.03m/s^2
Step-by-step explanation:
The unit of acceleration is m/s^2 (meters over second squared). Therefore it is the same as the velocity over the time, as m/s (formula for velocity) divided by s (time) is m/s^2
Therefore to answer the question all we need to do is find the velocity and time of B and C and divide them.
To find the velocity of points B and C we need to do final velocity - initial velocity which is 0.8 - 1 which is -0.2 (it is negative as the object is decreasing in velocity meaning it is decelerating.)
To find the time taken we need to do 15 - 8 which is 7 seconds. Therefore it takes 7 seconds for the ball to travel from velocity B to velocity C.
Now since the formula is Change in Velocity over time, we do -0.2 divided by 7 to get -0.02857142857 which can probably be rounded to -0.03.
Since the unit is m/s^2 the final answer is
-0.03m/s^2
I hope this is helpful please correct me if i am wrong.