Answer:
[tex]41.3 m/s^2[/tex]
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:
[tex]a=\frac{v_f-v_i}{t}[/tex]
where
[tex]v_f[/tex] is the final velocity
[tex]v_i[/tex] 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:
[tex]v_i=0[/tex] is the initial velocity
[tex]v_f=124 m/s[/tex] is the final velocity
t = 3 s is the time
So, the acceleration is
[tex]a=\frac{124-0}{3}=41.3 m/s^2[/tex]