Lakshya Education MCQs

Question: A point subjected to a number of forces will be in equilibrium, if
Options:
A. Sum of resolved parts in any two directions at right angles, are both zero
B. Algebraic sum of the forces is zero
C. Two resolved parts in any two directions at right angles are equal
D. Algebraic sum of the moments of the forces about the point is zero
Answer: Option A

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More Questions on This Topic :

Question 1. If the tension in a cable supporting a lift moving upwards is twice the tension when the lift is moving downwards, the acceleration of the lift, is
  1.     g/2
  2.     g/3
  3.     g/4
  4.     g/5
Answer: Option B
Question 2. The ratio of unit of force in gravitational system to that in absolute system is (where ‘g’ is acceleration due to gravity)
  1.     1
  2.     g
  3.     1/g
  4.     none of the above
Answer: Option B
Question 3. A heavy ladder resting on a floor and against a vertical wall may not be in equilibrium, if
  1.     Floor is smooth and the wall is rough
  2.     Floor is rough and the wall is smooth
  3.     Floor and wall both are smooth surfaces
  4.     Floor and wall both are rough surfaces
Answer: Option C
Question 4. A heavy ladder resting on a floor and against a vertical wall may not be in equilibrium, if
  1.     Floor is smooth and the wall is rough
  2.     Floor is rough and the wall is smooth
  3.     Floor and wall both are smooth surfaces
  4.     Floor and wall both are rough surfaces
Answer: Option C
Question 5. A point subjected to a number of forces will be in equilibrium, if
  1.     Sum of resolved parts in any two directions at right angles, are both zero
  2.     Algebraic sum of the forces is zero
  3.     Two resolved parts in any two directions at right angles are equal
  4.     Algebraic sum of the moments of the forces about the point is zero
Answer: Option A
Question 6. Minimum potential energy of a system will be in the position of
  1.     Stable equilibrium
  2.     Unstable equilibrium
  3.     Neutral equilibrium
  4.     All of the above
Answer: Option A

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