Net force and acceleration as a result of a parachute

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SUMMARY

The discussion focuses on the physics of net force and acceleration in the context of parachuting, specifically analyzing the scenarios of two individuals, Al and Betty. It is established that when the parachute is deployed, both individuals experience a net force of zero, halting their acceleration. The participants agree that Al, due to his greater mass, experiences more air resistance than Betty, although the exact calculations for this force are not provided. The importance of using free body diagrams to visualize the forces acting on each individual is emphasized as a key method for understanding the problem.

PREREQUISITES
  • Understanding Newton's Second Law (F = ma)
  • Knowledge of free body diagrams
  • Familiarity with concepts of air resistance and drag forces
  • Basic principles of motion and acceleration
NEXT STEPS
  • Study the application of Newton's Second Law in different contexts
  • Learn how to construct and analyze free body diagrams
  • Research the physics of air resistance and its impact on falling objects
  • Explore the equations of motion for objects under the influence of gravity and drag
USEFUL FOR

Students studying physics, educators teaching mechanics, and anyone interested in understanding the dynamics of parachuting and forces in motion.

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Homework Statement


upload_2017-10-3_17-47-50.png

Homework Equations


F= ma

The Attempt at a Solution


For 8, I think the parachute causes Al and Betty to stop accelerating, so they both have the same net force. (Answer A)

F= ma
F=m*0=0
F=3m*0=0

For 9, I feel like Al should experience more air resistance than Betty to make up for his greater mass, but
I'm not sure what equation would be used to calculate this.
 
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Welcome to PF!

Good answer for 8.

For 9, your intuition is good. For a more carefully reasoned argument, consider the individual forces acting on Al alone. It's a good idea do draw a diagram showing the forces acting on an object (a "free body diagram"). What can you say about these forces? Do the same for Betty.
 

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