Motion in A Plane

Physics Part I

Physics

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A stone is thrown from the top of a tower 50m high with speed 30m/s at an angle 30Â° with horizontal. Find the distance from the foot of tower where the stone will hit the ground.

Given that,Â

Â Â Â u = 30 m/s, Â Â Â Â

âˆ´ x component of velocity,Â

and Â

y component of velocity, Â Â

Â Â Â

Let the stone reaches the ground after time t.*Â Â Â Â Â Â Â Â Â Â Â Â ... *(1)We have,

Â Â Â Â

Putting the values in equatuion (1), we haveÂ

Â Â Â Â Â Â

i.e., Â Â Â Â Â Â

The distance from the foot of tower where the stone will hit the ground is,

Â Â Â Â Â Â Â s = u x t

Â Â Â Â Â Â Â Â Â = 25.98 x 5

Â Â Â Â Â Â Â Â Â = 104.9m

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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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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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