frollard 8 years ago ReplyThere are about 6 different answers based on how we interpret your question. How much time elapses between releasing an egg and it reaching a distance of 30 feet... How fast is the egg traveling after it's gone 30 feet... What effect does wind resistance have (quantitatively) on the acceleration due to gravity... Ep = MGH Ek = 1/2 MV^2 Ep (start)= Ek (end) therefore MGH = 1/2 MV^2 Weight of One (US) Large Egg: In Shell = 57 grams (doesn't matter because they cancel, but i'll include it here) 30 feet = 9.14400000003658 meters In the words of MC Front-a-lot, "Have you gathered all the facts that you needed to discern?" .057KG * 9.81 m/s^2 * 9.144 M == (0.057KG * V^2) / 2 multiply both sides by 2 2 * .057KG * 9.81 m/s^2 * 9.144 M == 0.057KG * V^2 cancel the masses 2 * 9.81m/s^2 *9.144m = V^2 evaluate V^2 = 179.40528 m^2/s^2 square root both sides V = 13.394m/s convert if you really want to be a tool: 13.394 (m / s) = 43.94 feet per second Did I use significant figures there? No, because I simply don't care. :) Another way to skin the cat: Vf^2 = Vi^2 + 2AD Vf^2 = 0 + 2 *9.81 m/s^2 * 9.144m Vf^2 = 179.40528 Vf = root(179.40528) Vf = 13.394 Whatddaya know, the formulas are really the same! Energy is conserved AND baby jesus doesn't cry about it. otherwise, d = (Vi + Vf)/2 * T which is handy for solving time, now that we are sure of how fast its going. T = d / (Vi + Vf)/2 T = 9.144m / (0 + 13.394m/s)/2 T = 9.144m / 6.697m/s T = 1.365 seconds. Now does that logically make sense? acceleration due to gravity is 9.81m/s squared so in the first of the 1.4 seconds, it travels half the distance, and by the end of that second is going nearly 10m/s. distance travelled is 5ish meters. In that last .4 seconds, its already zooming at 10m/s and speeding up...so its totally reasonable to think it will make the last half of the journey in half the time :) What will wind resistance be? Negligible, Do as others say and look up blunt body. Long story short it's the square (or cube) of the velocity and the cross section. so with such a small object at such a slow speed in such a slippery fluid (air) -- its really negligible.