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]]>If we assume all of the potential energy is converted to either drag or friction, that means 0.24 J is converted to drag while 1.43 J goes into friction. This means that roughly 14% of your energy losses are due to drag while the other 86% are due to friction.

Since the car has velocity at the finish, all the energy is not only drag and friction but also remaining kinetic energy. I think your derivation of the drag energy is good but you would need to estimate energy lost due to friction (i.e. the wheels) to be able to make a final conclusion. Perhaps calculating the actual/instantaneous kinetic energy at the finish using KE=1/2*m*v^2 (would need to estimate velocity at the finish somehow, radar gun?) then subtracting it and your drag energy from the total potential energy would result in energy lost due to friction. Then I think you could compare friction energy loss to drag energy loss.

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]]>Reading these lines bring me great recognition and sympathy. I’m glad though that many find it easier to talk about their introversion openly, perhaps mainly through the issue being more well known and a common vocabulary better spread by Susan Caine’s book and others.

I wonder if you would like to share how you deal with interaction overload with your closest family? Personally, I find this to be my greatest problem as a father of a three year old. While he’s bright, kind and lovely, the intensity of children is mind-boggling to me. You mention the commute being a good down-time, so perhaps you face the same situation?

Best regards from Sweden!

Axel Tojo

ps. I found your blog through the Engineering Commons episode you participated in.

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]]>Just a thought.

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