Calculating Vehicle Deceleration: Time & Distance

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SUMMARY

The discussion focuses on calculating the deceleration, stopping time, distance traveled during deceleration, and the vehicle's velocity after 3.2 seconds for a 4200lb vehicle traveling at 65mph with a braking force of 2850lbs. Participants recommend applying Newton's second law to determine the deceleration. The key equations include V = (p2 - p1) / time, which is essential for solving the problem. The discussion emphasizes the importance of understanding uniform deceleration in vehicle dynamics.

PREREQUISITES
  • Newton's Second Law of Motion
  • Basic principles of kinematics
  • Understanding of force and mass relationships
  • Familiarity with units of measurement (lbs, mph)
NEXT STEPS
  • Calculate deceleration using Newton's Second Law (F = ma)
  • Determine stopping time using the formula t = (v_f - v_i) / a
  • Calculate distance traveled during deceleration using d = v_i * t + 0.5 * a * t^2
  • Analyze the vehicle's velocity after 3.2 seconds of braking
USEFUL FOR

This discussion is beneficial for students in physics or engineering, automotive engineers, and anyone interested in vehicle dynamics and braking systems.

ajayespinoza
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Homework Statement



A 4200lb vehicle is cruising down the highway at 65mph when the driver steps on the brake applying a braking force of 2,850lbs
Determine the time to stop, assuming uniform deceleration
Distance traveled during the deceleration
Velocity of the vehicle after 3.2 sec's of braking

Homework Equations



V = (p2-p1)/time

The Attempt at a Solution


I currently do not have any attempts at a solution other than
4200-2850 then divide that by 65?
 
Last edited:
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ajayespinoza said:
A 4200lb vehicle is cruising down the highway at 65mph when the driver steps on the brake applying a braking force of 2,850lbs
Determine the time to stop, assuming uniform deceleration
Distance traveled during the deceleration
Velocity of the vehicle after 3.2 sec's of braking

Hi ajayespinoza! :smile:

Hint: Start by using good ol' Newton's second law to find the deceleration. :wink:
 

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