Physics of the Acceleration and Inertia of a Front Wheel Drive Car

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SUMMARY

The discussion centers on the physics of acceleration and inertia in front-wheel drive (FWD) vehicles, specifically how increased acceleration leads to weight transfer from the front to the rear wheels, resulting in reduced traction. Ken argues that as power increases, the inertia causes a paradox where the car cannot accelerate effectively due to diminished traction on the front wheels. The opposing view claims that acceleration and inertia do not negatively impact traction. A proposed solution is to change the drivetrain layout to rear-wheel drive to mitigate these effects.

PREREQUISITES
  • Understanding of basic physics concepts such as inertia and weight transfer
  • Familiarity with vehicle dynamics and traction principles
  • Knowledge of free body diagrams and their application in physics
  • Basic understanding of drivetrain configurations in vehicles
NEXT STEPS
  • Research the effects of weight transfer in front-wheel drive vehicles
  • Study vehicle dynamics equations related to acceleration and traction
  • Learn about the advantages and disadvantages of rear-wheel drive versus front-wheel drive
  • Explore free body diagram techniques for analyzing vehicle motion
USEFUL FOR

This discussion is beneficial for automotive engineers, physics students, and anyone interested in understanding the dynamics of front-wheel drive vehicles and their performance characteristics during acceleration.

Annihilator81
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Homework Statement

I'm trying to settle an argument about front wheel drive vehicles and acceleration vs inertia and traction.

Homework Equations



My position is that the faster a FWD car accelerates, the more inertia causes weight transfer off of the front wheels, and onto the rear wheels, causing the front wheels to have less traction.

As you increase power on a front wheel drive car, and the car accelerates faster, even more inertia causes even more weight transfer, the tires have even less traction, and the car will no longer accelerate.

Basically, this is a paradox of more power to accelerate causing the car to not be able to accelerate.

The opposition is that I am wrong, and that the acceleration and inertia will not cause a loss of traction.

The Attempt at a Solution

My solution would be to change the drivetrain layout so that the drive wheels are at the rear of the car where they will not be negatively affected.
I've not been able to properly demonstrate to the opposition that a front wheel drive car will suffer from this, and I'm looking for some reinforcement and an equation to confirm this.

Thanks in advance!

-Ken
 
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I agree with you.
Draw a free body diagram for the vehicle in profile. Mark the centre of mass and the points of contact of front and rear wheels. What forces apply? What equations can you write down regarding acceleration, linear forces and torques?
 

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