Recent content by cold

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    Newton's Second Law: Momentum & Proportionality

    The James Stewart 5th edition calculus edition is great. I've ignored physics problems for years but began struggling with line integrals and realized that physics and maths were closely linked so I'd better brush up. I'll look into that physics book. I understand the variable seperable...
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    Newton's Second Law: Momentum & Proportionality

    Ahhhh I seee! That makes sense! I reckon the more I think about physics the more I confuse myself. I'm with you on the squiddlebobs though after all, who is Newton anyway? Ok supposing that the mass varies. Do you consider small increments in time (delta t = dt) produce small changes in...
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    Newton's Second Law: Momentum & Proportionality

    Thanks. I'll get the book tomorrow and type it exactly. I think (though am not sure) the book uses t and not delta t because initially it considers uniform acceleration of a particle in a straight line and the SUVAT equations of motion. If the initial velocity is at t=0 then the change in t...
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    Newton's Second Law: Momentum & Proportionality

    I've a fairly good maths background, but I'm trying to improve my mechanics. Anyway, I read a version of Newton's second law as follows (I've not got it to hand so this may not be exactly right) The change in momentum per unit time is proportional to the resultant force in that direction...
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