Question

a vector a makes an angle of 20 degrees and b makes an angle of 110 degrees with the x axis . the magnitude of these vectors are 3 m and 4m respectively. find the resultant

Answer 1

Explanation:

Solution : As shown in the figure Angle between `vecA and vecB=110^0-20^0=90^0`<br> `|vecA|=3m` and `|vecB=4m`<br>` Resultant, R=sqrt(A^2+B^2+2ABcostheta)`<br> `sqrt(3^2+4^2+23.4 cos 90^0)`<br> =5m, <br> <img