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?
• $$v = 2.5 \, \mathrm{m/s}, \, u = 5 \, \mathrm{m/s}, \, a = 2 \, \mathrm{m/s^2}$$
• $$v = 5 \, \mathrm{m/s}, \, u = 2.5 \, \mathrm{m/s}, \, a = 2 \, \mathrm{m/s^2}$$
• $$v = 2.5 \, \mathrm{m/s}, \, u = 5 \, \mathrm{m/s}, \, t = 2 \, \mathrm{s}$$
• $$v = 5 \, \mathrm{m/s}, \, u = 2.5 \, \mathrm{m/s}, \, t = 2 \, \mathrm{s}$$