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Math Help - Impact Speed?

  1. #1
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    Impact Speed?

    What is the impact speed when a car mov-
    ing at 100 km=h bumps into the rear of an-
    other car traveling in the same direction at
    93 km=h? Answer in units of km=h.

    I'm not sure what impact speed is or how to calculate it. If I had to guess my answer would be 96.5 km/h, but I have to submit my answers online and I don't want to get a bunch wrong because I'll lose points
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  2. #2
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    The answer was 7km/h.

    The problem was referring to relative motion I guess, and the difference was 7km/h. What a silly way to word it
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  3. #3
    is up to his old tricks again! Jhevon's Avatar
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    Quote Originally Posted by vesperka View Post
    The answer was 7km/h.

    The problem was referring to relative motion I guess, and the difference was 7km/h. What a silly way to word it
    i thought so, but i didn't want to say anything (i know nothing about Physics)
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