The dimensions of force are:

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SSC CHSL Exam 2023 Tier-I Official Paper (Held On: 14 Aug, 2023 Shift 2)
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  1. [M0 L3 TO]
  2. [M L-3 T0]
  3. [M0 L T-1]
  4. [M L T-2]

Answer (Detailed Solution Below)

Option 4 : [M L T-2]
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SSC CHSL Exam 2023 Tier-I Official Paper (Held On: 02 Aug 2023 Shift 1)
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Detailed Solution

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The correct answer is [M L T-2].Key Points

  • The dimensions of force are typically represented as [M L T-2] because force is directly proportional to mass and acceleration, and acceleration is represented as [L T-2].
  • According to physics, a force is an influence that, in the absence of other forces, has the capacity to cause an object to change its velocity, or accelerate.
  • The everyday idea of pushing or pulling is made mathematically by the concept of force.
  • [M0 L3 TO] = Dimensional formula for volume.
  • [M L-3 T0] = Dimensional formula for density.
  • [M0 L T-1] =Dimensional formula for speed.

Additional Information

  • The term "dimensions" in this context refers to the fundamental physical quantities that are used to describe a particular physical quantity.
  • [M1 L2 T-2] represents the dimensions of torque, which is the twisting force that causes rotation.
    • The source of an angular acceleration is torque.
    • Thus, torque can be thought of as linear force's rotating equivalent.
  • [M1 L-1 T-2] represents the dimensions of pressure, which is the force applied perpendicular to a surface per unit area.
    • The International System of Units (SI) uses the Pascal (Pa) as the measure of pressure or stress.
  • [M0 L1 T-1 represents the dimensions of velocity, which is the rate of change of position with respect to time.
    • In kinematics, the area of classical mechanics that studies how bodies move, velocity is a basic idea. 
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