Question

write the expression for the magnitude and direction of the resultant of two vectors acting at a point​

Answer 1

Answer:

Parallelogram law states that if two vectors are considered to be the adjacent sides of a Parallelogram, then the resultant of two vectors is given by the vector which is a diagonal passing through the point of contact of two vectors.

In the figure

P

and

Q

are two vectors.with magnitudes equal to length OA and OB respectively and making angle θ between them. Complete the parallelogram, OACB,

Join diagonal OC , that makes angle α with vector

P

.

According to parallelogram law of vectors the resultant is represented by the diagonal passing through the point of contact of two vectors.

To find the magnitude of resultant , produce a perpendicular CD to meet OA produced to D.

From △ OCD,

OC

2

=OD

2

+CD

2

Explanation:

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