Lift Definition and 614 Threads

Is there any research being done towards the concept of a gravity lift? Is this purely a sci-fi idea or is there merit to it? I haven't the slightest idea how gravity works or what the source of the force is, but I'd like to learn more.

Evryone knows that the work done by a magnetic field is zero. Then how does a permanent magnet lift iron filings.

We all know that the work done by the magetic field is zero. But, how does the magnetic field lift iron objects?

Alright. I submit. I'm lost. I've been working on a plan for a derigible, or airship, and found that I've run into a problem. I've been using the equasion: [(H x W x L) x Pi] / 3 to calculate the capacity of the airbags within the derigible. I don't think this is correct so please help me...

I want to know how to calculate the amount of force req. in the given picture. I want to lift the load 3 meters high. Can anyone help.

Hi I wanted to get clear on this conclusion of lift distribution along the span of a wing. Graphs in texts show that for constant chord wings, Cl distribution along the span is eliptical. Conclusions: 1.Induced incidence is greater towards the tip. 2.Lift force at the root is PI/4...

A hydraulic lift has two connected pistons with cross-sectional areas 25 cm2 and 420 cm2. It is filled with oil of density 730 kg/m3. a) What mass must be placed on the small piston to support a car of mass 1000 kg at equal fluid levels? b) With the lift in balance with equal fluid levels...

can someone give me the formula needed to work this problem? A 4655-kg helicopter accelerated upward at 8 m/s2. What lift force is exerted by the air on the propellers?

hey guys i just found this site and its very helpful. so if u guys can help. it will be greatly appreciated i have this problem to solve but i stuck on solveing for the height of the airplane to find the force. so if anyone can assist me it will be great. thanks Lift on an Airplane. Air...

Let's say that I rig up a truck to a giant helium balloon, but I load up the back of the truck with enough stones so that the truck has reached a state of neutral buoyancy--its just floating in mid-air, not rising not falling, just there. Now let's say I take away a one-pound rock from the...

I was engaged in a discussion where someone claimed that Newton's Third Law does not apply to the lift created by air flow over a wing. My argument goes as follows: After all the equations, etc. involving fluid dynamics and Bernoulli's principle there is an upward force on the wing...

right from what i understood from the brain teaser question about forces on a wing lift come from the pressure difference between the two sides of the wing (faster air on top, u get the picture). i know there are many explenations for lift, but in this one why is it assumed that the air on top...

What two types of forces contribute to the lift on a wing?

Please click here first for some illustrations (otherwise it might be difficult to get my point across). The aerodynamic lift on the wing of an airplane (airfoil) is generally explained by the argument that the faster speed of the air along the top of the wing leads to reduced air pressure...