Błagam help ? Fizyka? To są proste krótkie zadania a maxim pkt to 69!! xD

1.12km/h=12000m:3600s=10/3m/s s=vt t=s/v t=12m:10/3m/s t=3,6s 2.v=s/t t=2hi4,5min=7200s+270s=7470s v=42195m:7470s v=5,65m/s=20,34km/h 3.v=420m:60s=7m/s 4.7,2km/h=2m/s 90km/h=25m/s 10m/s=36km/h 0,5m/s=1,8km/h 5.v=30km:½h=60km/h 6, s=vt s=340m/s×1200s s=408000m=408km 7.t=s/v t=108000m:10m/s t=10800s 8.a=v/t a=20m/s:10s a=2m/s² 9.144km/h=144000m:3600s=40m/s t=v/a t=40m/s:0,5m/s² t=80s 10.a=Δv/t Δv=116km/h-80km/h=36km/h a=10m/s:10s a=1m/s² 11.v=at v=6s×1,5m/s²=9m/s 12.a=80m/s:0,005s a=16000m/s²