Suppose earth is rotating with angular speed w.
Two trains are travelling on equator(assume :P)
A train A is travelling from East to West and a train B is travelling from West to East. The force exerted by trains A and B on tracks is F(a) and F(b) respectively. Which one is correct ?
A) F(a)F(b)
B) F(b)F(a)
C) F(a)=F(b)

Question

Suppose earth is rotating with angular speed w.
Two trains are travelling on equator(assume :P)
A train A is travelling from East to West and a train B is travelling from West to East. The force exerted by trains A and B on tracks is F(a) and F(b) respectively. Which one is correct ? 
A) F(a)>F(b)
B) F(b)>F(a)
C) F(a)=F(b)

anonymous · Answer

hooooowwwwwwww ??

anonymous · Answer

DO u know that earth rotates from west to east

anonymous · Answer

yes

anonymous · Answer

oops... Both trains have same masses also.. forgot

anonymous · Answer

so when the train  travels at the equator from west to east then there is also centripetal force of the earth..

anonymous · Answer

do u know what centripetal force is?

anonymous · Answer

lol yeah.. its one question from my ccircular motion chapter

anonymous · Answer

great..

anonymous · Answer

I'm sorry, I take that back. I think it's A)
I will reason in a moment.

anonymous · Answer

i thought C) lol

anonymous · Answer

because weight at equator is same

anonymous · Answer

For someone standing in outer space, the angular speed of  B is greater than A, correct?

anonymous · Answer

I dont the question is complete.... what about the speed of the trains... are they equal

anonymous · Answer

wait a moment

anonymous · Answer

yea same speed.. sorry :P

anonymous · Answer

Actually the answer is A)

anonymous · Answer

Can someone tell me a good reason :S

anonymous · Answer

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