Answer:
[tex]-5 m/s^2[/tex]
Explanation:
The acceleration of an object is equal to the rate of change of velocity of the object.
Mathematically, it is given by:
[tex]a=\frac{v-u}{t}[/tex]
where
u is the initial velocity
v is the final velocity
t is the time elapsed
For the ball in this problem:
u = 0.6 m/s
v = -0.4 m/s
t = 0.2 s
Therefore, the acceleration of the ball is:
[tex]a=\frac{-0.4-0.6}{0.2}=-5 m/s^2[/tex]
and the negative sign indicates that the acceleration's direction is opposite to the direction of the initial velocity.
