Terminal Velocity of Parachute: Investigating Mass & Diameter

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SUMMARY

The discussion focuses on investigating the terminal velocity of a parachute in relation to the mass it carries and its diameter. The equation used is F = mg - kv, leading to the formula v = [(2mg/rhoAc_d)]^1/2 for calculating terminal velocity. Participants suggest methods for measuring terminal velocity, including using a vertical wire setup with light beams and an electronic timer, or filming the drop with a digital video camera to analyze frame data. These methods aim to simplify the measurement process while ensuring accuracy.

PREREQUISITES
  • Understanding of basic physics concepts such as force and terminal velocity
  • Familiarity with the equation F = mg - kv
  • Knowledge of digital video analysis techniques
  • Experience with experimental setup involving timing mechanisms
NEXT STEPS
  • Research methods for measuring terminal velocity using digital video analysis
  • Explore the impact of mass and diameter on terminal velocity in parachute design
  • Learn about the physics of drag coefficients and their role in terminal velocity calculations
  • Investigate the use of electronic timing systems in physics experiments
USEFUL FOR

This discussion is beneficial for physics students, educators conducting experiments on motion, and hobbyists interested in parachute design and performance analysis.

xxneilxx
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Homework Statement


Aim: investigation of how terminal velocity of a parachute is related to the mass it carries and it diameter. object is a cube , height is 10m, diameter will only vary.


Homework Equations


I know that F = mg -kv
therfore v = [(2mg/rhoAc_d)]^1/2


The Attempt at a Solution


I am trying to find a simpler way to measure terminal velocity. Any help would be appreciated.
 
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Just measure the time taken for the cube to drop the last 10-20cm.
eg. Have the cube sliding down a vertical wire, so you know exactly where it will go, and have two light beam's 20cm apart that the cube will break + an electronic timer.
It might be tricky yo have a wire that doesn;t foul the chute.
Alternative is to paint lines on a background say 5cm apart, near the floor where the cube will land and film it with a digital video camera - then calculate how far the cube falls in a frame time of the camera.
Or the old fashioned way, do it in the dark with a regular camera and a strobe flash - the digital video is probably easier
 
thank you for your help
 

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