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Class 10 Class 12

For what value of c the vector  will be perpendicular to:
(i) Z-axis      (ii) Y-axis?

(i) Vector  is perpendicular to Z-axis if its dot product with  is zero.

i.e.

The equation is satisfied for all values of c.

Therefore  is always perpendicular to Z-axis whatever the value of c.

(ii) Similarly

∴   is perpendicular to Y-axis if c = 0.

107 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 vector quantities.

Force, impulse and momentum.
865 Views

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 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