A. 30°
B. 60°
C. 90°
D. 120°
Vectors And Equilibrium
Maximum number of rectangular components are_____________?
A. 1
B. 2
C. 3
D. 4
If A=B, which of the following is not correct ?
A. A.B = A^ B^
B. |A| = |B|
C. |A^| = |B^|
D. AB^ = BA^
Three coplanar forces acting on a body keep it in equilibrium. They should therefore be_______________?
A. Concurrent
B. Non-concurrent
C. Parallel
D. Non-parallel
I ^. (j^ x k^) is equal to______________?
A. 1
B. i^
C. j^
D. k^
The resultant of two forces of equal magnitudes is also equal to the magnitude of the forces. The angle between the two forces is________________?
A. 30°
B. 60°
C. 90°
D. 120°
The unit vector in the direction of vector A = 2 i^ -2j^ + k^ is_______________?
A. 2i^ – 2j^ + k^
B. (2i^ – 2j^ +k^)/9
C. (2i^ – 2j^ +k^)/3
D. (2i^ – 2j^ +k^)/5
A central force is that which__________________?
A. Can produce torque
B. Cannot produce torque
C. Some time can produce torque some time cannot
D. Has no relation with torque
Cosθi^ + Sinθj^ is a_________________?
A. Vector
B. Position Vector
C. Vector in the direction at angle θ with an x-axis
D. The unit vector in the direction at angle θ with an x-axis
Unit vector n^ is along______________?
A. X-axis
B. Normal on a surface
C. Y-axis
D. Z-axis
