# Two identical trains are moving on rails along the equator on the earth in opposite directions with the same speed. They will exert the same pressure on the rails. (True/False)

Two identical trains are moving on rails along the equator on the earth in opposite directions with the same speed. They will exert the same pressure on the rails.

(True/False)

## 9 Answers

SOLUTION

Both the trains are identical and are moving with equal speed . So in this case the magnitude of pressure will be equal but the trains are moving in opposite direction so the pressure exerted by a train on rail will be -ve of the pressure exerted by other train on the rail.

Therefore the statement is true as the pressure is exerted in downward direction in both the cases.

The question is not so simple as it appears. Actually the entire concept is related to the angular veolcity of the earth and centrifugal forces. Since the earth rotates frm west to east. the train moving along the equatior from west to east will experience a lesser centrifugal force and hence applies greater pressure. On the other hand the one moving from east to west will experiences a larger centriugal force and applies smaller pressures on the track.

Mg+F=Mv^2/R

in both the cases where f is the coriolis force