Question

9. The greatest resultant of two vectors P and
Q is n times their least resultant. Given. IPI>IQl. When theta is the angle between the two vectors, their resultant is half the sum of
the two vectors. Show that,
cos 0 = -(n? + 2 )/(n2 - 1)​

Answer 1

Answer:

For the magnitude of the resultant of twoforces to be minimum, the angle between thetwo vectors that represent the forces should be 180 degrees. In other words the forces should be in the opposite direction.