The resultant of two forces and act at right angles to . Then the angle between the forces is:
Step 1: Given Data
There are two forces and and their resultant is .
The resultant of two forces and is at a right angle to the .
, is the angle between and
Step 2: Formula used,
The direction of the resultant is given by
is the angle between and
and are the forces and is the angle between the forces and
Step 3: Calculating the angle between the two forces
Therefore, the angle between the forces is .
Therefore, the correct answer is (B).