Motion in a plain digital notes | class 11th
Motion in a plain complete vector first
In case of motion in two- dimensions (plane) or three dimensions(space),an object can have a large number of direction.In order to deal deal with such situations effictively,we need to introduce the concept of new physical quantities,called vectors,in which we take care of both magnitude and direction.
In case of motion in two- dimensions (plane) or three dimensions(space),an object can have a large number of direction.In order to deal deal with such situations effictively,we need to introduce the concept of new physical quantities,called vectors,in which we take care of both magnitude and direction.
Scalars and Vectors
Scalar quantities dosn't have direction and while on the other hand vector
quantities have direction.
Q)Difference between scalor and vector quantities?
note:-
All vector quantities have direction but All quantities that have directions are not vectors.
All vector quantities have direction but All quantities that have directions are not vectors.
Addition or composition of vectors
1)Trangle law of vector addition
2) Parallelogram law of vector addition
3)Polygone law of vector addition
Vector additon is commutative
Vector additon is associative
Analytical method of vector addition
It is used to find resultant and direction of resultant.
Scalar product of two vectors
when vector(A) multiplied by vector(B) gives |A| |B| cos theta.
Vector product of two vectors
when vector(A) multiplied by vector(B) gives |A| |B| sin theta n cap.
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