Deriving a differential equation for car motion

vendredi 1 novembre 2013

I'm looking at this scenario where a car is moving and then shifts into neutral. Knowing the initial velocity, how can I derive a differential equation?



I know the air drag and the frictional force... are there any other forces, like gravity, that should be included to make it realistic? I don't understand what a downward gravitational force would do for this problem






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