Does Dropping a Ball from Different Heights Affect Force or Work?

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Discussion Overview

The discussion revolves around the relationship between the height from which a ball is dropped and its force or work upon impact. Participants explore concepts related to force, acceleration, momentum, and gravitational effects, addressing potential confusions between these terms.

Discussion Character

  • Conceptual clarification, Debate/contested

Main Points Raised

  • One participant questions whether dropping a ball from different heights affects the force experienced by the ball, suggesting a possible confusion between force and work.
  • Another participant asserts that the confusion lies between force and momentum, indicating that momentum increases with height.
  • A third participant explains that the force acting on the ball due to gravity is constant (mg), and that all objects of the same mass experience the same acceleration regardless of drop height.
  • This participant emphasizes that while a more massive object experiences a greater force, objects of equal mass fall with the same force and acceleration from any height.
  • A final participant expresses gratitude for the clarification provided by others.

Areas of Agreement / Disagreement

Participants do not reach a consensus on the initial question regarding the effect of height on force, but there is agreement on the understanding that gravitational force and acceleration are independent of drop height for objects of the same mass.

Contextual Notes

Some assumptions about the definitions of force, work, and momentum may not be fully articulated, and the discussion does not resolve the nuances of how these concepts interact in different contexts.

Gheret
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Quick question

Doesn't F=mA imply that distance has no effect on force, but if I drop a 1kg ball from a height of 1m won't it have less force than the same ball from a height of say 5m?

Or am I just confusing force with work?

Thanks
 
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You are confusing force with momentum.
 
The force is what is causing the acceleration of the ball due to gravity. The momentum will be more for a higher drop.
 
If you drop two objects, the left hand side of that equation is equal to the mass of the object times the gravitational acceleration - that is: [tex]mg = ma[/tex] so your acceleration is simply g, the gravitational acceleration. An object experiences that acceleration on Earth no matter what it's mass is (as the mass cancels) and there is no dependence on how high it drops from. A more massive object will feel a greater force because the force by the gravitational field is mg, but objects with the same mass will fall with the same force and same acceleration from whatever height.
 
Thanks for clearing that up guys.
 

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