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Class 10 Class 12
There are two angles of projection for which horizontal range is the same. Show that product of their time of flights is directly proportional to the horizontal range?

The angles of projection, for which horizontal range is same, are θ and 90° – θ.

Time of flight for angle of projection θ is,

Time of flight corresponding to angle of projection (90°–θ) is,

Now, product of their time flight is,

That is,

Hence proved the relation.

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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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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.

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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.
835 Views

Give three examples of scalar quantities.

Mass, temperature and energy
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