Step-by-step explanation:
Average acceleration is defined as change in velocity divided by change in time.
Mathematically, a =

Since, it is given that change in velocity is 2 m/s. On the other hand,
= 0 sec and
= 4 sec.
Therefore, calculate average acceleration as follows.
a =

=

=

= 0.5

Therefore, we can conclude that average acceleration of the given particle is 0.5
.