With Instructables you can share what you make with the world, and tap into an ever-growing community of creative experts.

How it Works »New Instructable »Starship coil winding

by
nerd7473

How to Create a Paper Lamp

by
SabrinaM48

3 DIY Projects on Bone Conduction Technology

by
techiesms

How to Keep Up With Technology Trends

by
WandaLee21

How to approach your Technology coursework

by
rickharris

by
Inducktion

Technologically Advanced Christmas Tree Decorations!!!

by
Maundy

LTSPICE Importing Symbols

by
misperry

Walking robot UMB tech-3d printed

by
Venkat Jayanth

How To Perform Basic Math Function Without Creating a Formula in Microsoft Excel

by
TechnologyAdvice

FEATURED CHANNELS

Let your inbox help you discover our best projects, classes, and contests. Instructables will help you learn how to make anything!

active| newest | oldestEp = 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.

I posted the above on the grounds that you read and learn from it. If its homework and you just copy what I wrote down, you'll fail forever and baby jesus will cry.

. Google is your friend.

2) negligible for an egg from 30 feet but can be estimated from the blunt body (cross sectional area at its widest point)