Question

Freight trains can produce only relatively small accelerations and decelerations. What is the final velocity of a freight train that accelerates at a rate of 0.71 m/s2 for 3.85 min, starting with an initial velocity of 4.6 m/s? Keep 2 decimal places.

Answer 1

Answer:

Final speed of the train, v = 168.61 m/s

Explanation:

It is given that,

Acceleration of the train, $a=0.71\ m/s^2$

Time taken, t = 3.85 min = 231 s

Initial velocity of the train, u = 4.6 m/s

We need to find the final velocity (v) of the train. It can be calculated using first equation of motion as :

$v=u+at$

$v=4.6+0.71\times 231$

v = 168.61 m/s

So, the final velocity of the train is 168.61 m/s. Hence, this is the required solution.