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Class 10 Class 12

A particle is moving in a circle of radius r centred at O with constant speed v. Find the magnitude of change in velocity moving from A to B

Let  be the velocities of particle at A and B.

Since the speed of the particle () is constant.

Therefore,

As angle  therefore angle between the velocity vectors is also

Now,

=

This is the required change in magnitude of the velocity on moving from A to B.

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Give three examples of vector quantities.

Force, impulse and momentum.
865 Views

Give three examples of scalar quantities.

Mass, temperature and energy
769 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.

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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