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Motion in A Plane

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Physics Part I

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Physics

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CBSE Gujarat Board Haryana Board

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Class 10 Class 12

A body is at rest at x = 0. At t = 0, it starts moving in the positive x-direction with a constant acceleration. At the same instant another body passes through x = 0 moving in the positive x-directionn with a constant speed. The position of the first body is given by x1(t) after time ‘t’ and that of the second body by x2(t) after the same time interval. Which of the following graphs correctly describes (x1 – x2)as a function of time ‘t’?


B.

straight x subscript 1 space left parenthesis straight t right parenthesis space equals space 1 half space at squared
straight x subscript 2 space left parenthesis straight t right parenthesis space equals space vt
straight x subscript 1 minus straight x subscript 2 space equals space 1 half at squared space minus vt
straight x subscript 1 space left parenthesis straight t right parenthesis space equals space 1 half space at squared
straight x subscript 2 space left parenthesis straight t right parenthesis space equals space vt
straight x subscript 1 minus straight x subscript 2 space equals space 1 half at squared space minus vt
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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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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 vector quantities.

Force, impulse and momentum.
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Give three examples of scalar quantities.

Mass, temperature and energy
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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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