Ответ:
p= mv;
v(t) = x'(t) = 12t-8; v(4) = 12*4-8 = 40м/с;
р = 5*40 = 200кг*м/с
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Ответ:
p= mv;
v(t) = x'(t) = 12t-8; v(4) = 12*4-8 = 40м/с;
р = 5*40 = 200кг*м/с