Acceleration
a=124 -0)3
a (Vf-vilt
a velocity
Vf- fina velocity
t = time vizan
initial velocity

Explanation:

The acceleration of an object is the rate of  change of the velocity of the object.

It is a vector quantity, so it has a magnitude and a direction.

The acceleration is given by:

where

is the final velocity

is the initial velocity

t is the time taken for the velocity to change

If the acceleration is positive, the direction is the same as the initial velocity; if the acceleration is negative, the direction is opposite to the initial velocity.

In this problem:

is the initial velocity

is the final velocity

t = 3 s is the  time

So, the acceleration is

be subject to a force andchange its motion