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Contact Forces

A train is go...

Question

A train is going north, what is the direction of friction on it?

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Solution

Force of friction always acts on all the moving objects and its direction is always opposite to the direction of motion.

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Q. A train 120 m long is going towards north direction at a speed of 8 m / s . A parrot flies at the speed of 4 m / s towards south direction parallel to the railway track. The time taken by the parrot to cross the train is

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Q. Two trains depart from one station, one going north at

30.0

miles per hour, and another going northeast (

45^{o}

north of east) at

60.0

miles per hour.
At what rate does the distance between the two trains increase, in miles per hour?

150

length is going toward north direction at a speed of

10 m s^{- 1}

. A parrot flies at a speed of

5 m s^{- 1}

towards south direction parallel to the railway track. The time taken by the parrot to cross the train is equal to

150 m

long train takes

10 s

to pass a man who is going in the same direction at the speed of

2 k m p h

. What is the speed of the train?

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