Which presses surface by higher force

[vissh]

Homework Statement

A train "A" runs east to west and another train "B" of the same mass runs from west to east at the same speed along the equator."A" presses the track with a force F₁ and "B" presses the track with a force F₂
<a>F₁>F₂
<b>F₁=F₂
<c>F₁<F₂
<d>the information is insufficient to find the relation b/w F₁ and F₂

Homework Equations

When we view a motion from a rotating frame with constant angular velocity "w" , then a pseudo force = mw²r gets applied on the object in radially outward direction being viewed[where r is the distance of object from the axis].

The Attempt at a Solution

For both the trains . i am getting same value.
> mg - m(w_e)²R - F₁ = (mv²)/R
> mg - m(w_e)²R - F₂ = (mv²)/R
As for both the trains , mg will be toward Earth's center , pseudo force[as we see from frame of earth] radially outward .
But the answer is <a>.
Any guidance :)
Thanks in advance.

 

[tiny-tim]

hi vissh!

(have an omega: ω )

When we view a motion from a rotating frame with constant angular velocity "w" , then a pseudo force = mw²r gets applied on the object in radially outward direction being viewed[where r is the distance of object from the axis].

that pseudo force is the https://www.physicsforums.com/library.php?do=view_item&itemid=84" …

but what about the https://www.physicsforums.com/library.php?do=view_item&itemid=86" ?
​

(btw, it would be a lot easier to do this in a stationary frame! )

 

[vissh]

hi tiny-tim :D
Thanks got it now :) And yep using inertial frame gave a quick solution ^.^