Answer:
Acceleration of the object is given as
[tex]a = - 4 m/s^2[/tex]
so here negative sign shows that the direction of acceleration is opposite to the velocity of the object
Explanation:
As we know that velocity decreases uniformly from maximum to zero
so here in this uniform deceleration we know that
[tex]v_i = 60 m/s[/tex]
[tex]v_f = 0[/tex]
[tex]t = 15 s[/tex]
now by using the equation of kinematics we have
[tex]v_f - v_i = at[/tex]
[tex]0 - 60 = a(15)[/tex]
[tex]a = - 4 m/s^2[/tex]
so here negative sign shows that the direction of acceleration is opposite to the velocity of the object
