Okay. So imagine someone is sitting in a car and they have a dog on their lap. They are driving up to a weigh station to be weighed. Right at the exact moment that the weight reader person takes the reading, the driver throws the dog up into the air. (so the weight measurement is taken when the dog is in mid-air) SO, would the truck weigh the same or less than if the driver just kept the dog on his lap?
Its got me befuddled because isnt there a law of physics about how energy is neither created nor destroyed? So my thought was that the weight of the dog would be transferred to the driver as he tosses him up in the air. (the dogs weight force goes DOWN when he goes UP) But then part of me thinks that maybe if the dog is mid-air right when the weight measurement is taken, the weight has temporarily been suspended.
Argh... its driving me crazy! What would the correct answer be?
2007-05-30
05:56:08
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7 answers
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asked by
Anonymous
in
Physics