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Thread: impulse

  1. #1 impulse 
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    Okay say you find the impulse of something. 40N for 4 seconds. Your impulse would 160. But when you say that does it mean that 40 newtons are being applied for 4 seconds or does it mean that on average there are 10N being applied every second?


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  3. #2  
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    Impulse is most often used for analyzing collisions, where the force versus time can be complex and difficult to calculate or measure. The impulse is the change in momentum which can be determined from the velocity before and after the collision without knowing the actual time history of the acceleration.


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  4. #3  
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    If force is =ma and a is equal to v over t^2.

    then If impulse is F/t could it be also written as mv/t^3.

    Just wondering if this is a correct mathmatical move.
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  5. #4  
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    Quote Originally Posted by GenerationE
    If force is =ma and a is equal to v over t^2.
    But it isn't. Acceleration is a change in velocity per unit time, so you don't have the correct units.
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  6. #5  
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    very sorry I meant x/t is v and v/t is a so it would be mx/t^3?
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  7. #6  
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    Quote Originally Posted by GenerationE
    very sorry I meant x/t is v and v/t is a so it would be mx/t^3?
    Well, impulse is not F/t either it is force multiplied by time. Try this.
    http://en.wikipedia.org/wiki/Impulse
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  8. #7  
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    ok so its similar to momentum. I didn't know it was an integral. Thanks.
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