Question

Find the resultant vector of two vectors of 4 unit and 5 unit joint with the angle of 300​

Answer 1

Answer:

Let us call 4 unit vector as A. So. |A|=4 unit.

Now, we call another given vector as B. So, |B|=3 unit.

We select a two dimensional coordinate system such that x axis coincides with A.

Therefore, A=(4.0).

B=(3 cos 30 degree, 3 sin 30 degree)

B=(3 sqrt3/2, 3/2).

Therefore ,

A+B=[4+(3/2)(1.73) , 3/2] This is resultant vector.