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 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 $$8 \, \mathrm{m/s}$$.