Air Resistance and Gravitational Force

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SUMMARY

The discussion centers on the relationship between air resistance and gravitational force during free fall. When a person jumps from a plane, they initially accelerate downward due to gravity until they reach terminal velocity, where air resistance equals gravitational force. At this point, the net force is zero, confirming that the magnitude of the wind resistance force (F_R) is equal to the gravitational force (F_G). This equilibrium results in constant velocity and zero acceleration.

PREREQUISITES
  • Understanding of Newton's laws of motion
  • Basic knowledge of forces and their interactions
  • Familiarity with the concept of terminal velocity
  • Knowledge of free body diagrams
NEXT STEPS
  • Research the concept of terminal velocity in fluid dynamics
  • Learn about the mathematical modeling of forces in free fall
  • Explore the effects of varying air density on air resistance
  • Study the applications of Newton's laws in real-world scenarios
USEFUL FOR

Physics students, educators, and anyone interested in understanding the dynamics of free fall and the interplay between gravitational and air resistance forces.

Soaring Crane
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If you jumped out a plane, you would begin speeding up as you fall downward. Eventually, due to wind resistance, your velocity would become constant with time. After this occurs, the wind resistance force’s magnitude is

a.much smaller that the gravitational force acting on you.
b.slightly smaller that the force of gravity acting on you.
c.greater than the force of gravity acting on you
d.equal to the force of gravity acting on you.

Is it equal to the force of gravity? If there is constant velocity, then acceleration is 0. The sum of the forces would be equal to 0. In the vertical direction, F_R – F_G = 0. F_R = F_G?

Thanks.
 
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Sounds good, yes.
 

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