Tag Archives: ground

Have you ever wished you could fly like a bird?

I’m thinking of learning to hangglide. I hear it isn’t as dangerous as it was 30 years ago when people pioneered it. Nowadays hardly anyone plummets into the hard ground and kills themselves. I can’t understand why I never looked into this before. It’s a little expensive for lessons but I could buy my very own brand new hangglider for around $2000. I think a hangglider would be as close to real flight as a human could get with the wind in your face and no engine noise. Atleast until somebody builds a flapping version.

The Dream of Man Powered Flight.

http://www.manpoweredflight.com

more physic problem!!!!!!!!!?

You throw a rock of weight 21.0 vertically into the air from ground level. You observe that when it is a height 14.9 above the ground, it is traveling at a speed of 25.6 upward.
Part A
Use the work-energy theorem to find its speed just as it left the ground;
Take the free fall acceleration to be = 9.80 .
m/s

Part B
Use the work-energy theorem to find its maximum height.
Take the free fall acceleration to be = 9.80 .

Have you ever tried it barefoot?

I’m living in India – it’s almost six years now that I’ve left Europe for good – and I’m used to a life on bare soles: I haven’t worn shoes since December 2000 (with a few exceptions!) and I don’t think I’ll EVER imprison my feet again! I’m always barefoot: All-year-round, wherever I go, whatever I do. Most of my friends have never seen me wearing shoes… WHY? That’s a question I’ve heard a thousand times. Well, it’s not a kind of “fashion statement”… Walking barefoot is AMAZING!!! If you’re barefoot you’re able to FEEL the ground! Would you wear gloves all-year-round? Nopes! So: Why shoes? Being in touch with Mother Earth, letting the energy flow freely isn’t that bad, after all… Right? Plus: It’s very refreshing and stimulating (ever heard about the reflex zones in our feet?)! Join me for a rather longish hike, preferably in the mountains, and let’s see who gets tired first! Walking barefoot is stimulating: In every sense! There’s more: The ecological impact is far less dramatic (erosion!) if you’re hiking in a natural environment (ever thought about what your heavy hiking boots do to the ecosystem?). It’s also communicative to a degree you wouldn’t expect: Travelling a lot I’ve made more than one friend explaining WHY I’m roaming around barefoot! Somehow you’re more defensive, less aggressive if barefoot… There are many aspects, but what really counts is the sensual factor: The “barefoot feeling”! It’s not only about feeling the ground beneath our soles, every change in texture or temperature, the difference between lawn and concrete, tar and marble, but also about feeling free – in many ways! If you don’t know what I mean: Leave your shoes at home and experience the freedom, the freshness, the air touching every inch of your feet… Try it once and you’ll never want to wear those “little prisons” again! Do you know what I mean? Have you ever tried it barefoot?

energy from dead weight.?

energy is stored in any object. releasing it can be the trick. now if 500 lbs of lead is pressing against a spring that is just keeping lead from touching the ground, the spring is exsorting energy keeping the weight up. The energy in the spring can and should be able to be measured, as some type of heat, or measure the atoms that are being compressed. even if you could collect any energy from such a experiment you could use it for switching something Electrical or as a signal. it is energy. correct? it should be also free. Incress the weight, more energy. thanks for all input. Dave
Can I use this energy for any purpuse?. And once the weight is on the spring and it remains stable, thats what I want to use. it should remain usable for a long time, and using the right matereal it should last forever, being Relative.
and again, sorry, do you think that there is any energy In between the coils?
I think, that there maybe energy in between the coils. I just need to find a way to measure it. Maybe it has been tried, if so I would like to know, if not is anyone ever tried to measure such a test.?

why do aircraft engines continue to spin even when they are on the ground?

Jet engine turbines spin slowly even when the a/c is at the gate. Is this just the wind blowing them or is there some reason to keep them spinning by powering them.

Trenching for power and water

Part 1 of the trenching we did. The trench is for power in the front yard and water in the back.

Upward force versus gravity?

Say you had a 10 pound weight on the ground & you pulled upward with a force of exactly 10 lbs so that the weight was in perfect equilibium with no net force on it (10 lbs down & 10 lbs up). It would be motionless & no work would be being done.

Why couldn’t you now just touch it & with no effort, using your finger just push it up with almost no effort, and in this way push it up to 10 feet in the air thereby obtaining all this potential energy “for free” (ie, with almost no effort)?