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Two identical trains A and B move with equal speeds on parallel tracks along the equator. A moves from east to west . and B moves from west to east. Which train will exert a greater force on the track.
(1) A
(2) B
(3) they will exert equal force
(4) the mass and the speed of each train must be known to reach a conclusion
Hi,
As we know earth rotates from west to east so the train B will have speed v+wr
where v is speed of train, w is angular velocity of earth, r is radius of earth.
On the other hand train A moves in opposite direction of earths rotation so its net velocity is v-wr
So net centrifugal force on B will be greater due to which it will exert less force on track.
So,
correct answer is (1)
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