下列物体运动最快的是
A.4h内通过160km
B.10s内通过了100m
C.1h内通过1.2×106cm
D.1min内通过1000m
D
A、物体运动的速度v=s/t=160km/4h=40km/h≈11.1m/s;B、物体运动的速度v=s/t=100m/10s=10m/s;
C、1h=3600s,1.2×106cm=1.2×104m,物体运动的速度v=s/t=1.2×104mm/3600s≈3.3m/s;
D、1min=60s,物体运动的速度v=s/t=1000m/60s≈16.7m/s;
综上所述,D选项的速度最大.
故选D.