Ответ: -25/9 m/s≈ - 2.78 m/s
Объяснение:
V=Vo+at
120 km/h= 2km/min =2000 km/min =100 m / 3 sek =300/9 m/sek
80 km/h = 4km/3 min =4000m/3min=4000m/180 s=400m/18s=200/9 m/sek
200/9=300/9+a*4 => 4a=100/9
a=-25/9 m/s
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Ответ: -25/9 m/s≈ - 2.78 m/s
Объяснение:
V=Vo+at
120 km/h= 2km/min =2000 km/min =100 m / 3 sek =300/9 m/sek
80 km/h = 4km/3 min =4000m/3min=4000m/180 s=400m/18s=200/9 m/sek
200/9=300/9+a*4 => 4a=100/9
a=-25/9 m/s