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Class 10 Class 12
Two ships A and B start together from the same point. A sails 16 km/h towards east and B sails 20 km/h towards north. Find the relative velocity of B w.r.t. A and distance between them after 5 hours.

Velocity of ship A,
Velocity of ship B,

The relative velocity of B w.r.t. A is,

Magnitude of velocity is given by,

∴

and

So, relative velocity of B w.r.t. A is 25.6 km/h due

The distance between two ships after 5 hours,

S = Vt

= 25.6 x 5

= 128km.

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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.
865 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

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 scalar quantity?

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