Answer:
[tex]a = 0.83\ m/s^2[/tex]
Explanation:
Uniform Acceleration
When an object changes its velocity at the same rate, the acceleration is constant.
The relation between the initial and final speeds is:
[tex]v_f=v_o+a.t[/tex]
Where:
vf = Final speed
vo = Initial speed
a = Constant acceleration
t = Elapsed time
It's known a train moves from rest (vo=0) to a speed of vf=25 m/s in t=30 seconds. It's required to calculate the acceleration.
Solving for a:
[tex]\displaystyle a=\frac{v_f-v_o}{t}[/tex]
Substituting:
[tex]\displaystyle a=\frac{25-0}{30}[/tex]
[tex]\boxed{a = 0.83\ m/s^2}[/tex]
