Vectors and Equilibrium (a)

1- Whats the resultant of 3N and 4N forces acting at right angles

2-If A cross B is along z-axis then vectors A and B will lie in

3-If A= 2i+4j+5k and B=-2i+2j+k. then A.B is

4-Parallel vectors of same magnitude

5-When the magnitude of two components of vectors are equal to that of their resultant, then the angle b/w components id

6-If two unit vectors are inclined at angle of 90, then magnitude of their resultant is

7-If the vectors A and B represented in such a way that A+B=A-B, then the angle b/w A and B ia

8-The magnitude of dot and cross product of two vectors is 10 in each case. find the angle b/w two vectors

9-If A*B=-B*A then angle b/w A and B is

10-Which of the following physical quantities are represented by axial vectors

11-The two vectors have magnitude 3 and 5. if angle b/w them is 60, then dot product of two vectors is

12-The minimum number of vectors of equal magnitude required to produce a zero resultant is

13-The minimum number of vectors of unequal magnitude required to produce a zero resultant is

14-two forces of numerically equal to 10dynes  are acting, then the resultant is

15-what is the angle between  i+j+k and i