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
Physics MCQs with Answers
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
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
The cross product i^ x j^ is equal to_______________?
A. Zero B. One C. i^ D. k^
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 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°
In which quadrant, the only value of tan will be positive ?
A. First B. Second C. Third D. Both 1st and 3rd
The magnitude of i^. (j^ x k^) is________________?
A. 0 B. 1 C. -1 D. i^
If A=Ax i^ + Ay j^ + Az K^ B = Bx i^ + By j^ + Bz K^ then______________?
A. A. B = Ax Bx + Ay By + Az Bz B. A. B = Ax By + Ay Bz + Az By C. A. B = Ay Bz + Az By + Az Bx D. A. B = Ax Bz + Ay By + Az Bx
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