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Perfect! Jerry's final velocity was $$5 \, \mathrm{m/s}$$. His initial velocity was $$2.5 \, \mathrm{m/s}$$. So, the change in velocity is $$\left(5 - 2.5\right) \, \mathrm{m/s}$$, and it takes $$2 \, \mathrm{s}$$ for that change. So, the acceleration is $$\frac{5 - 2.5}{2}$$.
Hopefully, by now you are familiar with concepts of displacement, velocity and acceleration. In the next module, we will use equations to solve for these quantities. See you there!