Lakshya Education MCQs

Question: If two forces are in equilibrium, then the forces must (i) Be equal in magnitude (ii) Be opposite in sense (iii) Act along the same line
Options:
A.(i) and (ii)
B.(i) and (iii)
C.Only (i)
D.All (i), (ii) and (iii)
Answer: Option D

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More Questions on This Topic :

Question 1. The dimensions of power are.
  1.    M’L2T2
  2.    M’L’T3
  3.    M’L’r2
  4.    M’L-‘T*
Answer: Option B
Question 2. The Law of Polygon of Forces states that
  1.    If a polygon representing the forces acting at point in a body is closed, the forces are in equilibrium
  2.    If forces acting on a point can be represented in magnitude and direction by the sides of a polygon taken in order, then the resultant of the forces will be represented in magnitude and direction by t
  3.    If forces acting on a point can be represented of a polygon taken in order, their sides of a polygon taken in order, their resultant will be represented in magnitude and direction by the closing side
  4.    If forces acting on a point can be represented in magnitude and direction by the sides of a polygon in order, the forces are in equilibrium
Answer: Option C
Question 3. A cube on a smooth horizontal surface
  1.    Cannot be in stable equilibrium
  2.    Cannot be in neutral equilibrium
  3.    Cannot be in unstable equilibrium
  4.    Can be in any of these states
Answer: Option D
Question 4. Cartesian form of the equation of catenary is
  1.    y = c cosh x/c
  2.    y = c sinh x/c
  3.    y = c tan x/c
  4.    y = c sin x/c
Answer: Option A
Question 5. The instantaneous centre of a member lies at the point of intersection of two lines drawn at the ends of the member such that the lines are inclined to the direction of motion of the ends at
  1.    30°
  2.    45°
  3.    60°
  4.    90°
Answer: Option D
Question 6. The intrinsic equation of catenary is
  1.    S = c tan ψ
  2.    y = c cosh x/c
  3.    y = c cosh ψ
  4.    y = c sinh ψ
Answer: Option A

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