Question About A Simple Formula

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The discussion revolves around understanding how to derive the unit of work done, expressed as kg.m².s⁻², using fundamental physics equations. It emphasizes the relationships between velocity, acceleration, force, and work, specifically highlighting the need to substitute units into the work formula. The key point is to demonstrate that work can be expressed in terms of mass, distance, and time through unit substitution. Participants are seeking clarification on the process of showing this relationship. Ultimately, the focus is on the correct interpretation and manipulation of units in physics.
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Homework Statement



Since velocity = distance / time, the units of velocity are metres / seconds or ms-1. Use the equations (below) to show that the unit of work done can be written as kg.m2.s-2.

acceleration = change in velocity / time
force = mass X acceleration
work done = force X distance

Homework Equations



None needed.

The Attempt at a Solution



Can anyone please explain to me what this question is asking me to do and how I might go about showing this?

Thanks guys for your help.
 
Last edited:
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getfirefox said:

Homework Statement



Homework Equations



None needed.

The Attempt at a Solution



Can anyone please explain to me what this question is asking me to do and how I might go about showing this?

Thanks guys for your help.

It's only a question about the "kind" of units.

Just show through substitution how the units for expressing work are
Mass*distance*distance over time*time
 

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