Understanding Newton's Second Law: How to Calculate Average Force in a Car Crash

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SUMMARY

The discussion centers on calculating the average force experienced by racing driver David Purley during a car crash, where he decelerated from 173 km/h to 0 km/h over a distance of 0.660 m. Using the formula for impulse, the average force can be determined by applying the equation F = Δp/Δt, where Δp is the change in momentum. Given Purley's mass of 70 kg, the average force can be compared to his weight to understand the impact of the crash.

PREREQUISITES
  • Understanding of Newton's Second Law of Motion
  • Familiarity with the concept of impulse and momentum
  • Basic knowledge of kinematics and equations of motion
  • Ability to perform unit conversions (e.g., km/h to m/s)
NEXT STEPS
  • Learn how to apply the impulse-momentum theorem in various scenarios
  • Study the equations of motion for uniformly accelerated motion
  • Explore real-world applications of force calculations in automotive safety
  • Investigate the effects of deceleration on the human body during crashes
USEFUL FOR

Physics students, automotive engineers, safety analysts, and anyone interested in understanding the dynamics of car crashes and the forces involved.

tenchick19
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I have absolutely no idea how to do this problem and I need help with steps, formulas/equations, etc. So, here it goes!

David Purley, a racing driver, survived deceleration from 173 km/h to 0 km/h over a distance of 0.660 m when his car crashed. Assume that Purley's mass is 70 kg. What is the average force acting on him during the crash? Compare this force to Purley's weight.

Please help! Thanks! :bugeye:
 
Physics news on Phys.org
This is an impulse question. What do you know about impulse? You'll have to show some work before we can help you.
 

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