Question

A train is moving at a speed of 40 km/h. Which additional information would be required to determine the velocity of the train?

- the direction of the train
- the mass of the train
- the total distance covered by the train
- the time the train is traveling

Answer 1

the total distance covered by the train

Explanation:

-the direction doesn't matter, a train can go 40 km/h in any direction

-the mass doesn't matter, a heavy or a light train can go 40 km/h

-the time doesn't matter, it can be travelling at 2 am or 9 pm, that doesn't influence the speed.

The formula for velocity in physics is V = S/T (velocity = space divided by time). So space here would be the distance covered, which is the missing component. V = 40km/h, the time will be determined by the distance covered. Ex: if the distance covered is 80 km, then the time will be 2 hours.