题目内容
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 |
A、物体运动的速度v=
=
=40km/h=
m/s≈11.1m/s;
B、物体运动的速度v=
=
=10m/s;
C、1h=3600s,1.2×106cm=1.2×104m,物体运动的速度v=
=
≈3.3m/s;
D、1min=60s,物体运动的速度v=
=
≈16.7m/s;
综上所述,D选项的速度最大.
故选D.
s |
t |
160km |
4h |
40 |
3.6 |
B、物体运动的速度v=
s |
t |
100m |
10s |
C、1h=3600s,1.2×106cm=1.2×104m,物体运动的速度v=
s |
t |
1.2×104m |
3600s |
D、1min=60s,物体运动的速度v=
s |
t |
1000m |
60s |
综上所述,D选项的速度最大.
故选D.
练习册系列答案
相关题目