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suhel malik Grade:
        

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

7 years ago

Answers : (1)

Anurag Kishore
37 Points
										

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)

7 years ago
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