Acceleration across a frictionless surface

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Discussion Overview

The discussion revolves around the behavior of an object on a frictionless surface when a force is applied. Participants explore the concepts of acceleration, constant velocity, and the effects of ceasing to apply force, touching on Newton's laws of motion.

Discussion Character

  • Exploratory, Technical explanation, Conceptual clarification

Main Points Raised

  • One participant questions what happens to an object's acceleration when a force is applied on a frictionless surface and whether it will accelerate infinitely.
  • Another participant asserts that the object will cease accelerating as soon as the applied force is removed.
  • A different participant calculates the final velocity of a 100kg object pushed with 200N of force for 2 seconds, concluding it would travel at 4m/s indefinitely after the force is removed.
  • One participant confirms that the object will maintain the velocity it had at the moment the force was removed.
  • A later post references Newton's first and second laws, suggesting a connection to the principles discussed.

Areas of Agreement / Disagreement

Participants generally agree that once the force is removed, the object will continue at a constant velocity. However, the initial question about infinite acceleration remains unresolved, as it was not directly addressed in the responses.

Contextual Notes

The discussion does not fully explore the implications of different forces or additional factors that could affect motion, such as external influences or varying forces over time.

Who May Find This Useful

This discussion may be useful for individuals interested in classical mechanics, particularly those studying Newton's laws of motion and the effects of forces on motion in idealized scenarios.

Sammy101
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Hi, I am confused on the topic of friction. I thought of a question that I cannot answer.

What happens if you push an object with a certain amount of force and mass on a frictionless surface? According to F=ma, you will be able to get the acceleration of the object, but how will you know when the object stops acceleration? Will the object accelerate infinitely?
 
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As soon as you stop applying force to the object it will cease accelerating. IE if you push a block, as soon as you take your hand off or stop pushing it will cease accelerating.
 
And so then it will just continue at a constant velocity right?

So, if you pushed on a 100kg object with 200N of force for 2s and then let go on a frictionless surface, the objects final velocity would be 4m/s because:

F=ma
200N=100kg(a)
a=2m/s^2

t=2s
velocity= 2m/s^2(2s) = 4m/s and that's how fast it would travel forever on a frictionless surface?
 
Yes, as soon as the force applied ceases, the object will continue at whatever velocity it was when you removed the force.
 
Thank you!
 
Newton's first law & 2nd law
 

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