General Physics

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)

Ravi Dwivedi

14 Years agoGrade

9 Answers

Devesh Lall

14 Years ago

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.

Swapnil Saxena

14 Years ago

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.

pavani suhani

14 Years ago

since we are discussing the motion of trains wrt earth which is non inertial so we have to include coriolis force which is perpendicular to both axis of rotation of earth and the velocity of train.and it is supposed to act towards the centre when the sense of motion of train is the same as the sense of rotation of earth and away from the centre in the other case . hence a train presses the track with greater force when its sense of rotation is opposite to that of the earth.
Mg+F=Mv^2/R
in both the cases where f is the coriolis force

ATHARV REVDIKAR

14 Years ago

true because pressure is a scaler quantity

Nirmal Krishna Bhattacharyya

9 Years ago

Centrifugal force experience by the train is negligible as compared force of attraction by earth. Force of attraction is indicated by the weight of the train.The given weight is the cause of wear and tear and moving on rail transfer the weight of at lower rate .

Sallu Singh

9 Years ago

for the people discussing here on out the answer I want to draw your attention on one specific thing that here there is a mention of equator which means that I was the position about the various forces like coriolis force and other centrifugal forces differences are eliminated with this word so don`t be confused with the interference of the other forces in this question

L

8 Years ago

Angular speed are same but in opposite directions and hence required centripetal force for both the trains will be different. So, normal reaction (or pressure) will also be different.

Aastha Luthra

8 Years ago

The trains are identical but due to the difference in direction, the force experienced by them would be different and and hence pressure wind e different. So the give statement is false

midhun varma

5 Years ago

Angular speed and hence the required centripetal force for both the trains will be different. So, normal reaction (or pressure) will also be different.