Study Guides/Physics/Dimensional Formula of Work
Study Guide · Physics

Dimensional Formula of Work

In Physics, Work is done when a force acting upon an object causes a displacement. The dimensional formula of work is identical to that of energy.

Question (Click to Flip)

What is the dimension formula of work?

Answer

The dimensional formula of work is [M L² T⁻²].

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Key Facts

Formula: Work = Force × Displacement.

Dimensional Formula: [M L² T⁻²].

SI Unit: Joule (J).

Same dimension as: Energy, Heat, and Torque.

Derivation

Step 1: The formula for Work is: Work = Force × Displacement

Step 2: Write the dimensions of Force and Displacement:

  • Dimension of Force = Mass × Acceleration = [M] × [L T⁻²] = [M L T⁻²]
  • Dimension of Displacement = [L]

Step 3: Substitute them into the formula: Work = [M L T⁻²] × [L] Work = [M L² T⁻²]

SI Unit and Similar Quantities

  • SI Unit: Joule (J) or N·m (Newton-metre).
  • Important Note: Work, Kinetic Energy, Potential Energy, Heat, and Torque all share the exact same dimensional formula: [M L² T⁻²].

Questions and Answers

What is the dimension formula of work?+

The dimensional formula of work is [M L² T⁻²].

Which other physical quantities have the same dimension as work?+

Energy (all forms: kinetic, potential, heat) and Torque have the exact same dimensional formula as work, which is [M L² T⁻²].

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