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Class 10 Class 12
A body is projected with velocity 19·6 m/s in horizontal direction. After what time the horizontal and vertical component of velocity will be the same?

Given, that the body is projected in the horizontal direction.

So, we have

Now, the horizontal component of velocity at any instant is given by,

Vertical component of velocity is,

Since, horizontal and vertical component of velocity is the same, we have

9.8 t = 19.6

i.e.,        t = 2s
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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.
1212 Views

Give three examples of vector quantities.

Force, impulse and momentum.
865 Views

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.

814 Views

Give three examples of scalar quantities.

Mass, temperature and energy
769 Views

What is a vector quantity?

A physical quantity that requires direction along with magnitude, for its complete specification is called a vector quantity.
835 Views