Пуля летящая со скоростью 400м/c ударилась о деревянную доску и углубилась в нее на 20см.с каким ускорение двигалась пуля внутри доски?
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12.03.2019 23:20
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3
20см = 0,2м
S = 0,5at²
Vo = at
at = 400
найдём время внедрения t
0,2 = 0,5·400·t
0,2 = 200t
t = 0,001c
ускорение
a = Vo:t = 400:0,001 = 400 000 м/с²