Air Resistance (Drag Force) and Terminal Velocity

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SUMMARY

The discussion clarifies the relationship between air resistance and terminal velocity, specifically in the context of a parachutist. It establishes that terminal velocity is achieved when the force of air resistance equals the weight of the parachutist, resulting in a net force of zero and no further acceleration. The key takeaway is that air resistance is not the sole resultant force; rather, it combines with weight to determine the overall force acting on the parachutist.

PREREQUISITES
  • Understanding of Newton's laws of motion
  • Familiarity with the concepts of force and acceleration
  • Basic knowledge of air resistance and its effects on falling objects
  • Concept of terminal velocity in physics
NEXT STEPS
  • Study the principles of Newton's second law of motion
  • Explore the mathematical modeling of air resistance
  • Learn about the factors affecting terminal velocity in different scenarios
  • Investigate the physics of parachuting and free fall dynamics
USEFUL FOR

This discussion is beneficial for physics students, educators, and anyone interested in understanding the dynamics of falling objects and the effects of air resistance on motion.

Apothem
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Homework Statement



"How does air resistance affect terminal velocity"


Homework Equations



N/A

The Attempt at a Solution



I know most of the answer of this, however I am just wondering say take a parachutist for example, if the air resistance is the resultant force, then in order to reach terminal velocity the parachutist would have to decelerate until the air resistance=weight and hence terminal velocity is achieved, is this correct?
 
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Apothem said:

Homework Statement



"How does air resistance affect terminal velocity"


Homework Equations



N/A

The Attempt at a Solution



I know most of the answer of this, however I am just wondering say take a parachutist for example, if the air resistance is the resultant force, then in order to reach terminal velocity the parachutist would have to decelerate until the air resistance=weight and hence terminal velocity is achieved, is this correct?

Yes.
 
Almost right, the air resistance isn't the resultant force. The resultant force is the air resistance + the weight. When the air resistance is equal to the weight, the resultant force is zero and so there is no acceleration.
 

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