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Class 10 Class 12
Read the statement below carefully and state, with reasons, if it is true or false:

A.

(a) The net acceleration of a particle in circular motion is always along the radius of
the circle towards the centre

A. FALSE
The net acceleration of a particle is towards the centre only in case of a uniform circular motion.
The net acceleration of a particle is towards the centre only in case of a uniform circular motion.

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The net acceleration of a particle is towards the centre only in case of a uniform circular motion.
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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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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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Give three examples of scalar quantities.

Mass, temperature and energy
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Give three examples of vector quantities.

Force, impulse and momentum.
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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.
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