LAWS OF MOTION Newton’s first law: Every body persists in its state of rest or of uniform motion in a straight line unless it is compelled to change that state by external force on it. From Newton’s first law, we get definition of force and inertia. Force: Force is the push or pull which […]
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MAXIMA AND MINIMA CONCEPT: Let us consider a physical quantity y depends on another physical quantity x i.e. y = ƒ(x). A graph shown in figure represents the variation of y with respect to x. From the graph point A represents the maximum value of y when x = and point B represents the minimum […]
Explore MoreVector triple product: 1. ( ) = (.) – (.) 2. ( ×) × = – ×( ×) = – [(.) – (.)] = (.) – (.) 3. (×).(×)×(×) = (.×)² Prove: Let, × = so, (×)×(×) = ×(×) = (.) – (.) = (×.) – (×.) = (.×) – (.×) = ( […]
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Lami’s theorem is used to relate forces with angle between them when three coplanar forces are acting from a point in equilibrium. The ratio of one force to the sine of angle between other two forces is constant. Statement and prove: According to Lami’s theorem, for a triangle, the ratio of one side with the […]
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Scalar: The quantities which are represented by magnitude and have no directions and follow the ordinary algebra are called scalar quantity. Example: mass, volume, speed, density etc. Vector: The quantities which are represented by magnitude and directions and follow a special type of algebra (vector algebra) are called vector quantity. Example: velocity, acceleration, force etc. […]
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