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Class 10 Class 12
A stone is thrown from the top of a tower 50m high with speed 30m/s at an angle 30° with horizontal. Find the distance from the foot of tower where the stone will hit the ground.

Given that,

u = 30 m/s,

∴ x component of velocity,

and

y component of velocity,

Let the stone reaches the ground after time t.

... (1)

We have,

Putting the values in equatuion (1), we have

i.e.,

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

s = u x t

= 25.98 x 5

= 104.9m

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What is a vector quantity?

A physical quantity that requires direction along with magnitude, for its complete specification is called a vector quantity.
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Give three examples of scalar quantities.

Mass, temperature and energy
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Give three examples of vector quantities.

Force, impulse and momentum.
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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.

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