What is the relationship between force and height when lifting an object?

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Discussion Overview

The discussion revolves around the relationship between force and height when lifting an object, specifically exploring the equations related to work and gravitational potential energy. Participants are examining the concepts of force, work, and energy in the context of lifting objects, with a focus on understanding the correct application of the equations involved.

Discussion Character

  • Exploratory
  • Technical explanation
  • Conceptual clarification
  • Debate/contested

Main Points Raised

  • One participant suggests that the force done on a lifted object can be represented by the equation F = mgh, questioning its equivalence to gravitational potential energy.
  • Another participant clarifies that the work done to lift an object equals the increase in gravitational potential energy, indicating a potential misunderstanding of the terms used.
  • A different participant emphasizes that they are focused on force and seeks to determine the change in gravitational potential energy for a specific mass lifted a certain height.
  • One participant states that the force should be represented as F = mg, which is the weight of the object, when considering the minimum work required to lift it against gravity.
  • A later reply acknowledges a misunderstanding and expresses gratitude for the clarification provided by others.

Areas of Agreement / Disagreement

Participants exhibit some disagreement regarding the terminology and the relationship between force and work. While there is a consensus that work is related to gravitational potential energy, the precise definitions and applications of force in this context remain contested.

Contextual Notes

Some participants appear to conflate the concepts of force and work, leading to confusion about the equations involved. The discussion reflects varying levels of understanding and assumptions about the definitions of work and force in physics.

Who May Find This Useful

This discussion may be useful for students or individuals seeking clarification on the concepts of force, work, and gravitational potential energy, particularly in the context of lifting objects in physics.

yyttr2
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Is the force done on a lifted object equal the weight of the object in Newtons times the height lifted?
F=mgh?
I would have used this but I noticed it was the same equation for gravitational potential energy (or just potential energy)...So I thought I would ask you all after failing to find it online.
 
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yyttr2 said:
Is the force done on a lifted object equal the weight of the object in Newtons times the height lifted?
I suspect you meant work instead of force.
F=mgh?
I would have used this but I noticed it was the same equation for gravitational potential energy (or just potential energy)...So I thought I would ask you all after failing to find it online.
Yes, the work you must do to lift an object equals the increase in gravitational potential energy.
 
no, no I was talking about force. I am trying to find the change in gravitational potential energy from a 2.0 object being lifted 3.5 meters.
So I thought I would find Ke at the bottom.


\sum w=\Delta ke

W=F.d

So I want to know if F=mgh
:)

If I am completely full of crap and doing it wrong please tell me o.O
 
yyttr2 said:
W=F.d

So I want to know if F=mgh
No, F = mg (the weight). (Assuming you are doing the minimum work to overcome gravity.)

So W = Fd = mgh.
 
oh, duh xD I feel stupid now. thank you.
 

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