Calculating Deceleration Rate of a Car

  • Context: High School 
  • Thread starter Thread starter Timpo
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    Deceleration Rate
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Discussion Overview

The discussion revolves around calculating the deceleration rate of a car using given initial and final velocities, along with the distance traveled during deceleration. The inquiry includes a specific question about how to determine the stopping distance from a different initial speed.

Discussion Character

  • Exploratory, Technical explanation, Homework-related

Main Points Raised

  • One participant asks if it is possible to determine the deceleration rate of a car with the provided information about initial and final velocities and distance.
  • Another participant provides the kinematic equation v^2 = u^2 + 2as, identifying variables for final velocity, initial velocity, acceleration, and displacement.
  • A third participant suggests looking up Newton's laws of motion, indicating that there are multiple derivations related to the equations of motion that could be relevant to the discussion.
  • A later reply expresses gratitude for the responses received, indicating engagement with the discussion.

Areas of Agreement / Disagreement

The discussion does not appear to reach a consensus on the method to calculate deceleration or the stopping distance, as participants provide different types of information and suggestions without resolving the initial question.

Contextual Notes

Participants have not explicitly stated any assumptions or limitations regarding the calculations, and the discussion does not clarify how to apply the provided equation to the specific scenario of stopping from 60 km/h.

Timpo
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I apologize for my ignorance, I'm an extreme newbie in physics.
Is it possible to determine the deceleration rate of a car only with following information?

initial velocity = 60mph (96km/h)
final velocity = 0mph (0km/h)
distance = 146ft (44.5m)

if so, how many distance would it take to stop from 60km/h (37.5mph)?

Thank you
 
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[tex]v^2=u^2+2as[/tex]

v=Final velocity
u=initial velocity
a=acceleration
s=displacement.
 
do a search for Newton's laws of motion. they are probably the most well known equations for scientists and engineers and worth remembering. there are a few other derivations than the one that rock freak has given you.
 
thanks a lot guys!
 

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