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  • Physics question: How much force would it take to knock a smart car over if you hit it high on the side?

    In a slightly unrelated question, how much force can a 17stone (100and something kg) cyclist exert at around 30mph?

    (In case you can't read between the lines a smart car pulled out on me and I think I might have been going fast enough to knock it over... Which I would willingly break my shoulder to be part of)

  • In my unqualified opinion I think that's totally feasible. Better luck next time.

  • Physics question: How much force would it take to knock a smart car over if you hit it high on the side?

    The force isn't quite the thing you're after, although you clearly have to exceed some minimum required to lift the car. Looking at the energy, it seem that ~5kJ would be enough to raise the car by tilting until the centre of gravity fell outside the ground contact area. 100kg cyclist at 13m/s has ~8.5kJ of kinetic energy. The problem would be in obtaining a coupling efficiency of 60%, i.e. making sure most of the kinetic energy was converted into gravitational potential energy in the car, rather than being wasted on stuff like work of fracture in your bones. I'd guess, based on a first approximation, that you couldn't tip it over just by crashing into it. On the other hand, you could probably tip it onto its tailgate by lifting the front :-)

  • I'm not sure how tall you are but I'm sure a lot of people would be more likely to fly over the car and not make full contact with it.

    I hit a VW golf side on at somewhere between 20 and 25 a couple of years ago and managed to go over it leaving my bike on the other side and a decent dent in the drivers door (Fuck yeah for arrospok)

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