Grade 99 grade science

what are vectors?
I need the full topic of Vectors and thier sums.

RAJEEV R

10 Years agoGrade 9

3 Answers

Hinal Srivastava

Approved Tutor Answer10 Years ago

a quantity having direction as well as magnitude, especially as determining the position of one point in space relative to another.is called a vector

Neeti

10 Years ago

Vector is any quantity which has a magnitude and a direction. It is depicted by an arrow with the arrow head pointing towards the direction of the vector.

Example of a vector would be, force, velocity ( while speed is a scalar, and has magnitude only) , displacement (while distance has magnitude only).

When two vectors A and B are present touching each other at their base, making an angle $\Theta$ with each other,

The magnitude of the resultant is given by

R = (A² + B² + 2AB cos $\Theta$ )^1/2 , and the direction of the resultant R given in terms of angle made by it with one of the vectors is:

tan $\Phi$ = A sin $\Theta$ / B + A cos $\Theta$ where $\Phi$ is the angle between resultant R and vector B.

Please feel free to ask any follow up question and approve the answer if you like it :)

A M S ARUN KRISHNA

10 Years ago

To specify some physical quantity magnitude and directions are needed and also obey laws of vector addition is called vector quantity
Example : displacement, velocity, acceleration, weight (5N means magnitude 5 and direction is vertically downwards
Current does not follow vector addition so it is a scalar quantity
Please approve my answer