Derivation of F:-m.a
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If a body of mass "m" moving at initial velocity "u" accelerates uniformly with an acceleration "a" for time"t" so that it's final velocity changes Into "v".
then initial momentum p1 = mu
final momentum p2 = mv
change in momentum = p1-p2
= mv-mu
= m(v-u)
according to 2nd law of motion
F = change in momentum ÷ time
F = p2-p1 ÷ t
F = m(v-u)÷ t
F = ma 《 v- u ÷ t 》
hence derived...
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