As a train accelerates away from a Station, it reaches a speed of 3.9 m/s in 7.2 seconds. If the train's acceleration is constant, what is it's speed after an additional 4.5 seconds have elapsed?

A) 3.8 m/s

B) 4.2 m/s

C) 5.7 m/s

D) 6.3 m/s

As a train accelerates away from a station, it reaches a speed of 4.7 m/s in 5.0s. If the train's acceleration remains constant, what is its speed after an additional 6.0 s has elapsed?

The electric motor of a model train accelerates the train from rest to 0.620 m/s in 21.0milliseconds (ms). the total mass of the train is 875g. Find the average power delivered to the train during its acceleration.

The electric motor of a model train accelerates the train from rest to 0.620 m/s in 21.0 milliseconds (ms). The total mass of the train is 875 g. Find the average power delivered to the train during its acceleration.