Find the acceleration of a train whose speed increases from 7m/s to 17 m/s in 120s

Initial speed of the train = 7 m/s

Final speed of the train = 17 m/s

Change of speed of the train = (17 - 7) m/s

= 10 m/s

Time taken for the change of the speed of the train = 120 s

Then

Acceleration of the train = Change of speed of the train/Time taken for the change of speed

= 10/120 m/s^2

= 1/12 m/s^2

= 0.083 m/s^2

So the acceleration of the train is 1/12 meter per second square or 0.083 m/s^2. I hope this is the answer you were looking for.