За 3 с средняя скорость 2 м/c
За 9 с
vcp=(s1+s2+s3)/(t1+t2+t3)=(v1*t1+v2*t2+v3*t3)/(t1+t2+t3)=
=(2*3+0+3*3)/(3+3+3)≈1 м/с
Ответ Б)
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За 3 с средняя скорость 2 м/c
За 9 с
vcp=(s1+s2+s3)/(t1+t2+t3)=(v1*t1+v2*t2+v3*t3)/(t1+t2+t3)=
=(2*3+0+3*3)/(3+3+3)≈1 м/с
Ответ Б)
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