The magnitude of i^. (j^ x k^) is________________?
A. 0
B. 1
C. -1
D. i^
In which quadrant, the only value of tan will be positive ?
In which quadrant, the only value of tan will be positive ?
A. First
B. Second
C. Third
D. Both 1st and 3rd
The cross product of two vectors is a negative vector when______________?
The cross product of two vectors is a negative vector when______________?
A. They are parallel vectors
B. They are anti parallel vectors
C. They are a perpendicular vector
D. They are rotated through 270°
The unit vector in the direction of vector A = 2 i^ -2j^ + k^ is_______________?
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
The cross product i^ x j^ is equal to_______________?
The cross product i^ x j^ is equal to_______________?
A. Zero
B. One
C. i^
D. k^
It is easier to turn a steering wheel with both hands than with a single hand because______________?
It is easier to turn a steering wheel with both hands than with a single hand because______________?
A. Accelerating force increases on the wheel
B. Two forces act on the wheel
C. Two hands provide a firm grip
D. The couple acts on the wheel
Which of the following pairs does not have identical dimensions ?
Which of the following pairs does not have identical dimensions ?
A. Torque and energy
B. Momentum and impulse
C. Energy and work
D. Mass and moment of inertia
Three coplanar forces acting on a body keep it in equilibrium. They should therefore be_______________?
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
The resultant of two forces of equal magnitudes is also equal to the magnitude of the forces. The angle between the two forces is________________?
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°
Which one is not correct for a vector A= 2i+2j+3k ?
Which one is not correct for a vector A= 2i+2j+3k ?
A. Has direction 45° with an x-axis
B. Has magnitude 2
C. Has magnitude 2 and direction °=45° with a y-axis
D. Has magnitude -2