с. потом шёл 30м в течении 1 минуты. Какова средняя скорость ёжика?...

July 2022 1 8 Report

сначала ёжик катился по лесу 10м, со скоростью 20м/с. потом шёл 30м в течении 1 минуты. Какова средняя скорость ёжика?

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IUV

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средняя скорость = весь путь / все время

S1 = 10 м
v1 = 20 м/с
t1=S1/v1
S2=30m
t2=60c
v средн = (S1+S2)/(t1+t2) = (S1+S2)/(S1/v1+t2) = (10+30)/(10/20+60) м/с =0,661157м/с ~ 0,66 м/с ~ 40 м/мин

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