Vectors and Equilibrium MCQs for MDCAT Practice

Physics section, Vectors and Equilibrium chapter. Sample questions from past PMC papers.

1. Question 1
   The expression (1/√2 i + 1/2j) is a
   • A.unit vector
   • B.null vector
   • C.vector of magnitude √2
   • D.scalar
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2. Question 2
   If displacement of a body is d = 3i, its only significance is:
   
   • A.The displacement of 3 units is not along any axis
   • B.The displacement of 3 units along z-axis
   • C.The displacement of 3 units along y-axis
   • D.The displacement of 3 units along x-axis
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3. Question 3
   The magnitude of vectors A, B, C are 3, 4 and 5 units respectively. If A+ B=C then the angle between A and B
   • A.π/2
   • B.cos−1 0.6
   • C.tan−1 7/5
   • D.π/4
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4. Question 4
   The angle between two rectangular components of any vector
   • A.0°
   • B.30°
   • C.40°
   • D.90°
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5. Question 5
   The point at which whole mass of the body is concentrated is called:
   • A.Centre of gravity
   • B.Centre of mass
   • C.Centre of action
   • D.Centre of body
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6. Question 6
   Let we have three vectors A , B and C , then according to distributive law:
   
   • A.Option A: Vector addition distributes over scalar multiplication
   • B.Option B: Scalar addition distributes over vector multiplication
   • C.Option C: Vector multiplication distributes over scalar addition
   • D.Option D: Scalar multiplication distributes over vector addition
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7. Question 7
   The minimum number of unequal forces whose vector sum can be zero is
   • A.One
   • B.Two
   • C.Three
   • D.Four
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8. Question 8
   In a Cartesian plane, the x-axis is called
   • A.Z-axis.
   • B.Vertical axis.
   • C.Rotational axis.
   • D.Horizontal axis.
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