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The first step in solving any problem is listing down the known and the unknown variables. Let us rewrite the 1st EOM: \(v = u + a*t\). Recall that \(v\) is the final velocity, \(u\) is the initial velocity, \(a\) is the acceleration and \(t\) is the time period.
In the previous module, we saw that Jerry's velocity changed from \(2.5 \, \mathrm{m/s}\) at \(2 \, \mathrm{s}\) to \(5 \, \mathrm{m/s}\) at \(4 \, \mathrm{s}\). Which of the following represents the information given in the previous sentence?

\(v = 2.5 \, \mathrm{m/s}, \, u = 5 \, \mathrm{m/s}, \, a = 2 \, \mathrm{m/s^2}\)

\(v = 5 \, \mathrm{m/s}, \, u = 2.5 \, \mathrm{m/s}, \, a = 2 \, \mathrm{m/s^2}\)

\(v = 2.5 \, \mathrm{m/s}, \, u = 5 \, \mathrm{m/s}, \, t = 2 \, \mathrm{s}\)

\(v = 5 \, \mathrm{m/s}, \, u = 2.5 \, \mathrm{m/s}, \, t = 2 \, \mathrm{s}\)