一輪賽車用了5小時完成了900km的賽事,求該賽車的速率.
答案以m/s為單位
數學題...............
2007-01-24 4:39 am
回答 (7)
2007-01-26 9:29 am
the answer is correct but other people is faster and more detail
2007-01-25 3:26 am
該賽車的速率=
900/5
=180(km/h)
=180/3.6(m/s)
=50m/s
∵1km/h=1*10^3m/3.6*10^3s
∴1km/h=1/3.6m/s
∴1m/s=3.6km/h
例如:20m/s=72km/h
10m/s=36km/h
900/5
=180(km/h)
=180/3.6(m/s)
=50m/s
∵1km/h=1*10^3m/3.6*10^3s
∴1km/h=1/3.6m/s
∴1m/s=3.6km/h
例如:20m/s=72km/h
10m/s=36km/h
2007-01-24 7:54 pm
5小時=300分鐘=18000秒
900km=900000m
所以速率=50m/s
900km=900000m
所以速率=50m/s
2007-01-24 4:45 am
time=5小時=5*60minutes = 5*60*60 seconds
distance=900km=900*1000m
速率=distance/time=(900*1000)/(5*60*60)=50m/s
distance=900km=900*1000m
速率=distance/time=(900*1000)/(5*60*60)=50m/s
2007-01-24 4:45 am
900/5=180m/s
收錄日期: 2021-04-13 15:26:03
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20070123000051KK03869