Still vs. Moving
Imagine a race. When the starter says "go," the runners zoom off. But before that moment, everyone stands still. Their speed is 0 m/s.
Here is how to tell the difference:
- Moving: You run to the playground. Your speed is higher than zero.
- Stopped: You sit on a swing that isn't swinging. Your speed is
0 m/s.
Speed is just how fast something covers distance. If you cover no distance, your speed is zero.
| Situation | Speed |
|---|---|
| Book on table | 0 m/s |
| Bike rolling | 5 m/s |
| Car driving | 60 km/h |
When you are in a parked car, you are not going anywhere. Even if the engine is on, if the wheels aren't turning, you have zero meters per second. It means you are staying put, safe and steady, until you decide to move.
Examples
- A ball sitting still on the floor
- A car parked in a driveway
- A bird perched on a branch
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