A man first moves 3 m due east, then 6 m due north and finally 7 m due west, then the magnitude of the resultant displacement is (in metre)

Given that A + B + C = 0 out of three vectors two are equal in magnitude and the magnitude of third vector is  times that of either of two having equal magnitude. Then angle between vectors are given by

If P + Q = R and |P| = |Q| = √3 and |R| = 3 then the angle between P and Q is

Out of the following set of forces, the resultant of which cannot be zero

Resultant of which of a following may be equal to zero?

If a and b are two units vectors inclined at an angle of 60 degrees to each other, then

12 different coplanar forces fall of equal magnitude) maintain a body in equilibrium, then the angle between any two adjacent forces is

Question is mentioned below :

Two forces 8 N and 12 N act at 120°. The third force required to keep the body in equilibrium is

The resultant of two forces 3P and 2P is R. If the first force is doubled then the resultant is also doubled. The angle between the two forces is