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Motion in A Plane

Physics Part I

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Class 10 Class 12
Which of the following is/are true:

A.

1.) A particle moving towards east may have acceleration acting towards north.

B.

2.) A boy is moving towards left with a speed of 8 m/s and a man is moving with a speed of 13 m/s in same direction. The relative velocity of the boy w.r.t. man is 5 m/s left.

C.

3.) It is possible that the average velocity of the body is zero but the average speed is not zero.

A.
True
B. FALSE
C.
True
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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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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 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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