Fantastic! Jerry's speed is \(5 \, \mathrm{m/s}\) over the

**entire**10 seconds of the journey. At some points, Jerry's speed can be**more than**\(5\), at other times it can be less than \(5\).When we said that the speed of Jerry was \(5 \, \mathrm{m/s}\), that was the

The speedometer measures the speed of an object at that very instant. This speed is called

**average speed**. Just because an object's average speed is \(5 \, \mathrm{m/s}\) doesn't mean that its speed is**always**\(5 \, \mathrm{m/s}\). So, the speedometer can sometimes show \(2 \, \mathrm{m/s}\), and at other times show \(8 \, \mathrm{m/s}\).The speedometer measures the speed of an object at that very instant. This speed is called

**instantaneous speed**.