You throw a stone from the Earth's surface. It reaches a maximum height of $$10 \, \mathrm{m}$$. Which of the following would you use to determine its initial velocity?
1st EOM: $$v = u + a*t$$. 2nd EOM: $$s = u*t + \frac{1}{2}*a*t^2$$. 3rd EOM: $$v^2 = u^2 + 2*a*s$$
• 3rd EOM with $$u = 0 \, \mathrm{m/s}$$, $$s = 10 \mathrm{m}$$ and $$a = 9.8 \mathrm{m/s^2}$$
• 3rd EOM with $$v = 0 \, \mathrm{m/s}$$, $$s = 10 \, \mathrm{m}$$ and $$a = 9.8 \, \mathrm{m/s^2}$$
• 3rd EOM with $$u = 0 \, \mathrm{m/s}$$, $$s = -10 \, \mathrm{m}$$ and $$a = -9.8 \, \mathrm{m/s^2}$$
• 3rd EOM with $$v = 0 \, \mathrm{m/s}$$, $$s = 10 \, \mathrm{m}$$ and $$a = -9.8 \, \mathrm{m/s^2}$$