145.5km/h= m/s
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145.5km/h= m/s
145.5km/h= m/s
145.5km/h= m/s
145.5km=145500m
1h=3600s
所以145500m÷3600s=40.42m/s
1m/s=1km/h 所以145km/h=48.5m/s
40.4
145.5km/h= m/s
145.5km/h= m/s
145.5km/h= m/s
145.5km=145500m
1h=3600s
所以145500m÷3600s=40.42m/s
1m/s=1km/h 所以145km/h=48.5m/s
40.4