I How could Class III Levers till be considered Levers at all?

  • Thread starter ELLE_AW
  • Start date
Summary
It seems to go against the definition.
I thought the definition of a Lever was a machine that will decrease the force needed to do work by increasing distance. Since Class III levers always have a mechanical advantage less than 1, and they actually increase the force needed, how could they be considered levers at all? I don't get it.
 
27,508
4,018
Does changing the classification change the physics? The useful kinds of classifications are ones that guide you to use appropriate equations.

That said, I have never seen that definition of a lever and I don’t think it is a particularly good definition since it would apply to hydraulics also. I think that this is a rather trivial concern based on a poor definition.
 
Last edited:

A.T.

Science Advisor
9,378
1,387
It seems to go against the definition.
Your definition of a lever is not very useful then. And the classifications of levers in general depend on the reference frame and what you consider the pivot, which is kind of arbitrary.
 

Want to reply to this thread?

"How could Class III Levers till be considered Levers at all?" You must log in or register to reply here.

Physics Forums Values

We Value Quality
• Topics based on mainstream science
• Proper English grammar and spelling
We Value Civility
• Positive and compassionate attitudes
• Patience while debating
We Value Productivity
• Disciplined to remain on-topic
• Recognition of own weaknesses
• Solo and co-op problem solving
Top