Motion in A Plane

Physics Part I

Physics

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Two trains, each of length 100 m, are running on parallel tracks. One overtakes the other in 20 seconds and one crossesÂ the other in 10 second. Calculate the velocities of each train?Â

Let u and v be the velocity of two trains A and B. While overtaking the relative velocity of train A w.r.t B = u -v.Â

While crossing, the relative velocity of train A w.r.t B = u+ v.

Total distance to be travelled by car A while crossing = 100 + 100 = 200Â

So,Â

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What is a scalar quantity?

A physical quantity that requires only magnitude for its complete specification is called a scalar quantity.

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What are the basic characteristics that a quantity must possess so that it may be a vector quantity?

A quantity must possess the direction and must follow the vector axioms. Any quantity that follows the vector axioms are classified as vectors.Â

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