A train A runs from 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.

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KollegeApply · Accepted Answer

F1 > F2 Explanation: Earth rotates about its axis from west to east. For Train A: "v"_"A" = "v" - omega"r" For Train B: "v"_"B" = "v" - omega"r" For Train A: `"mg" - "N"_"A" = ("m"("v" - omega"r")^2)/"r" "N"_"A" = "mg" - ("m"("v" - omega"r")^2)/"r" Similary for Train B : "N"_"A" = "mg" - ("m"("v" - omega"r")^2)/"r" Clearly "N"_"B" < "N"_"A"` and F1 > F2. [Solution diagram: 66626_solution_1.png] [Solution diagram: 66626_solution_2.png]

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