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Force has the dimension of mass times acceleration:Force=𝑀⋅𝐿⋅𝑇−2Force=M⋅L⋅T −2

Question

Force has the dimension of mass times acceleration:Force=𝑀⋅𝐿⋅𝑇−2Force=M⋅L⋅T −2

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Solution

The equation you've provided is a representation of Newton's second law of motion, which states that the force applied to an object is equal to the mass of the object multiplied by its acceleration.

Here, M represents mass, L represents length (which is part of the acceleration term), and T represents time. The negative exponent on the time unit indicates that time is in the denominator of the equation (since acceleration is change in velocity (length/time) per unit time, it has units of length/time²).

So, in terms of dimensions:

  • Force is measured in Newtons (N), which can be broken down to kg*m/s² (kilogram meter per second squared).
  • M (mass) is measured in kg (kilograms).
  • L (length) is measured in m (meters).
  • T (time) is measured in s (seconds).

Therefore, the dimensional formula for force is [M^1L^1T^-2] or simply M⋅L⋅T^−2. This means that force is derived from one part mass, one part length, and two parts time (in the denominator).

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