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Disney World cast member hurt stopping 180-kg fake boulder from hitting audience (www.bbc.com)
submitted 10 months ago by to c/offbeat@lemmy.ca
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[–] 2 points 10 months ago (1 child)

Ah good point, I assumed the rubber deflection would have altered the interaction. But when a larger bolder hits something there has to be some impulse calculation, Like when a bus hits a cyclist, the bus doesn't stop from firing the cyclist away fast

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  • [–] 1 point 10 months ago

    It's a partially elastic collision. So basically all the momentum is transferred into the person. Makes the calculation really simple:

    V_person = mass_ball / mass_person * V_ball

    For the bus and cyclist it would be some small amount of momentum removed from the bus by the cyclist because the bus doesn't stop. The relative masses are so different, which is why it appears the bus doesn't slow at all. It does though, but only a tiny bit.

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