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Class 10 Class 12
What is a projectile and what are the assumptions made in the study of projectile motion?

A body projected with some initial velocity and then allowed to fall only under gravity is called a projectile.

Assumptions made in the study of projectile motion:

(i) Acceleration due to gravity ‘g’ is constant both in magnitude and direction.

(ii) There is no resistance due to air.

(iii) The earth is flat.

(iv) Rotational motion of the earth is absent.

800 Views

What is a scalar quantity?

A physical quantity that requires only magnitude for its complete specification is called a scalar quantity.
1212 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

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 vector quantities.

Force, impulse and momentum.
865 Views

Give three examples of scalar quantities.

Mass, temperature and energy
769 Views