A train A runs from east to west and another train B of the same maas runs from west to east at the same speed along the equator. A presses the track with a force `F_1 and B` presses the track with a force F.

Options

A. `A`
B. `B`
C. They will exert equal fore
D. The mass and the speed of each train must be known to reach a conclusion.

Answer

A

Explanation

Let `v`: speed of each train relative to the earth's surface
`v_(E):` Speed of earth's surface relative to the earth's axis `v_(A),v_(B)`: Speed of `A` and `B` relative to the earth's axis Then `v_(A)=v_(E)-v,v_(B)=v_(E)+v`
`N_(A)=mg-(mv_(A)^(2))/R,N_(B)=mg-(mv_(B)^(2))/R`
`N_(A)gtN_(B)`