Lift Definition and 593 Threads

I was always wondering if you can lift anything (no matter how heavy it is) if you just use a really long pipe. Or does torque increases in a way like ##e^x## , ##a^x## and after some point it barely increases? Also if this can be explained mathematically, I would love to see it.

Hi, I have been asked to identify the right vacuum pump to lift the object having 500 grams weight with one suction cup. I am going through lot of materials to identify correct formulas to calculate the lifting force. and now I am able to calculate the theoretical lifting force. But seems, I am...

Hey guys I want to build electromagnet which can lift up to 3 kg from 26 gauge copper wire, 12V battery (bike), so how many turns should I do and what will be length and radius of the solenoid?

v=16m/s+4*.659s=18.636m/s (for lift) v0=16m/s-9.81*.659s=9.53m/s my question is that why 16m/s is considered for screw velocity ? it is given for lift .what does it mean 9.53m/s? If you drop something , it gets acceleration and I calculate it 6.45m for screw while falling and why should I...

Hello, I have a design for a different type of aircraft. I wanted an actual engineer to give advice before I fork over for some parts to try and make a working model. Attached are some pics. some of the pics are as if it were a full size acft. But for the model I was just going to use two turbo...

As shown in the figure, the aircraft includes a geomagnetic field convergence layer, which is a superconductor material. The geomagnetic field convergence layer repels the direction of changing the geomagnetic field, so that the geomagnetic field passes between the upper and lower converging...

<< Mentor Note -- thread moved from the technical forums so no Template is shown >> Hello, I built a hovercraft not long ago for an experiment. What I did was applying more power to the motor and looking at how high the hovercraft could go. However, the formula that I was planning to use, uses...

Homework Statement We have a plane which lift area is A=500 m2 and weight of plane is m= 540 000 kg. That the plane can stay in air the pressure difference between top and bottom of the lifts have to be: B>G --> Δp= (m*g)/A = 10 594.8 Pa. Homework Equations Bernoulli equation The Attempt at...

Homework Statement A pyramid weighing 4000 lb has a base 6ft square and an altitude of 4ft. The base covers an opening in the floor of a tank in which there is water 4 ft deep. Underneath the floor of the tank and on the water surface there is air at atmospheric pressure. What vertical force is...

Hello, I'm trying to use this gearbox motor as a winch to lift up a small box (5kg), however it needs to have some sort of drum that's mounted to the motor shaft to wrap the string around. Although I'm unable to find anything suitable that I could use. Is there already something that exists that...

Hello guys, I am trying to calculate the lift force and drag force in a wind tunnel at my school as a part of a project that i am doing. I am varying the length of the airfoils and trying to measure the lift force and drag force. I have 3-d printed 7 airfoils. However, I am not able to find any...

If I have a contraption with wings that weighs 120 kg, the wings in total are 2 meter squared, and I make it go 60 km/h, will it fly? According to the lift equation (L = (1/2) d v^2 a CL), it should, since L=(1/2)*1.225*277.788*2*3.39 = 1176.789 Weight = 120 kg = 1176.789 N L = lift = 1176.789...

On the internet, I found two different explanations for lift force. In one of the explanations, bernoullis equation was applied between the stream flowing under and the stream above the aerofoil(the stream above moves faster and so less pressure than the lower). The other explanation says...

Hey everyone,I am trying to make a helicopter using an AVR or ARDUINO BOARD I wanted to know how do I calculate the force required to lift the helicopter.Can anyone also help me how much revolutions per minute(r.p.m) should the fans generate.I am planning to use two fans.

I'd trying to design a vertical lift engine to lift about 30 pounds in the air about one foot off the ground with minimum power. The device has to hover. The engine should itself weight 5 pounds or less and have a footprint no larger than one square foot. By minimum power, I mean something like...

mass of air X velocity = mass of man x gravity (10000)x(v)=60x10 velocity=600/10000 how come velocity is so less? I am still in school so forgive me if my calculations look stupid.

Hi there, I am currently looking to build a rotating kiln to provide the necessary heat/res. time/gases to react a solid feedstock. The problem that I can envision, however, is that the solid (which is fed as small particles) may become entrained in the counter-current gas flow inside the...

Hello everyone, I am pondering on the airflow around a wing: When air flows over a wing, part of the air goes below the wing and part over the wing. Even when the air is moving, the pressure at a point in space is always isotropic. The pressure on top of the wing is slightly lower than than...

I plan to build a hatch door in one side of my shed. The plan is that the hatch door will be hinged at the top long edge. The hatch door will open from the bottom long edge. The hatch door will open out and up to a horizontal position (possibly slightly past horizontal). My question is what...

Hi, Reading about different ways to lift a human being, I've come to realize the easiest is simply manipulating density as follows: Denisty of Air at STP: 1.20 kg/m^3 Density of He at STP: 0.000179 kg/m^3 Therefore for every cubic metre (m^3) of air displacement, lift achieved is ~1.2 kg/m^3...

Hello Forum, I understand that an airplane can fly when its overall weight ##W_{plane}## (force pointing down) is perfectly balanced by an upward directed force called lift ##F_{lift}##. If the lift is larger than the weight, the plane will rise in height. When the airplane is empty and...

Homework Statement Consider the elevator and screw in Example 2-17. Assume the velocity of the elevator is 16 mls upward when the screw separates from the ceiling. (a) How far does the elevator rise while the screw is falling? How far does the screw fall? . I have only problem second part of...

Homework Statement In my robotics class I was task with creating a robot to lift and house objects, I have the lifting mechanism, and a housing area, but I can't figure how to get the bucket of the robot to dump using a rotary motor. Homework EquationsThe Attempt at a Solution Tried to fixate...

Yesterday I post a thread, this post is continue of that one. In pic 1 lift is accelerating. A observe inside the lift would assume that he is on planet. if he is on planet time slow on ground and fast in sky. Pic2 shows gravitational field, that have high magnitude in bottom, low at...

In Principle of equivalence, we indroduce to the theoram by a lift experiment, my question is why the lift is fully closed one, why the observer in lift forbidden to observe out side world

I want to know about how to get more lift from aircraft wings without increasing engine power and wingspan.

Hi, I am looking into aerodynamic parameters for rockets (ogive nose, cylindrical body of different diameters, four fins at bottom) and have a question about the lift coefficient. If a rocket is launched vertically, with zero incidence angle and wind, would that result in a very small lift...

Homework Statement Two blocks are attached by strings of negligible mass to a pulley with two radii R1=0.06 m and R2=0.08 m. The strings are wrapped around their respective radios so that the masses can move either up or down. The pulley has a moment of inertia I=0.0023 kgm2 , and is supported...

As I was going through a course on Hydraulics, there was a brief explanation about how the atmospheric pressure can only support a water column of 10.3 m.A few more points that are prerequisite to the discussion are as follows 1)A fluid cannot be pulled;it has to be pushed. 2)A centrifugal...

I always seem to get into "big" projects these days and need to whip out some math that has a lot of cobwebs. I'm not too worried about injuring myself... but I don't want to inadvertently have something break over a vehicle bed / trailer. I think most of the system components are good... I...

Assume a pendulum was swinging in a lift. If the cable breaks and the lift starts to accelerate down at g would the pendulum stop swinging and freeze in its current position? Merry Xmas. G.

Homework Statement I'm using a force of 392 pound feet of force to move an object that weighs 250 lb a distance of 22 in in 1.3 seconds.. how do I determine how much power was consumed in this move?[/B] Homework Equations Power = force * distance/ time The Attempt at a Solution 749 watts

So I have heard this around the internet before but thought is was a question worth exploring if a jet plane is sitting on a treadmill and the treadmill moves backwards at the same rate the plane is moving forward will it take off? I think no because the plane would have to be moving forward for...

Homework Equations P = W*V Fnet = ma V = 3.0 m/s W = 29.9[/B]The Attempt at a Solution I think i got this wrong, but I want you to check if my answer is right :( Heres what i did: So, P = force * velocity P =force*3.0 m/s force = force due to gravity + acceleration (net force) is F = ma =...

I am trying to calculate the lift generate by a helicopter rotor using the lift equation, which is L = \frac{1}{2} \rho V^2 * C_L * S \\ where \\ \rho\mbox{ = density} \\ V\mbox{ = velocity of a point on the rotor} \\ C_L\mbox{ = lift coefficient} \\ S\mbox{ = surface area swept out by the...

Homework Statement Homework Equations The Attempt at a Solution [/B] Effective gravity = g-a So Frictional force = tension Tension = m(g-a) u 2m(g-a) =m(g-a)

How i can know the magnitude of lift and drag force from ansys cfx?

Hi everybody, I'm designing the wing of a new aeromodel and I need a few informations for the structural design of the wing box that I couldn't find in the few litterature I have by now. So, here comes the question... For the sizing of the box beam that will be the main resistant part of the...

Suppose that L: ##S^1## ---> ##R## is a lift of the identity map of ##S^1##, where e is the covering map from ##R## to ##S^1##, where ##R## is the real numbers and ##S^1## is the circle. Then the equation e * L = ##Id_{S^1}## (where * is composition) means that 2*pi*L is a continuous choice of...

Homework Statement Given: Thrust: 103000 N Lift = ? Weight = 86500 N Resistance = ? Homework Equations I'm just to figure out the value of resistance and lift. The Attempt at a Solution I can't seem to figure out a way to find out resistance, but with lift I believe it has something to do...

1. Homework Statement https://i.imgur.com/tG9unNs.png 2. Homework Equations in picture below 3. The Attempt at a Solution https://i.imgur.com/egZC3Ay.jpg I calculated the angle of attack is "7", yet the answer is "1", which implies the coefficient of lift is about 0.2 from the answer. I...

Does a Rogallo wing generate a lift at all ? If yes, how ? It does not seem to have wing profile to generate lift.

Hello! First off, here is a video of what a roll back is: Here's my question: How could I determine how much of a load the lift is carrying for there to be a loss of friction between the haul rope (the cable) and the bull wheel (the main wheel at both the top and bottom terminals), causing...

Hello Everybody! I am looking for some help in formulating an investigation topic relating to ski lifts. What measurable physics topics relate to ski lifts? One idea I came up with how much downward pressure of riders on a chairlift would overcome the friction of the haul rope (the cable) on...

Homework Statement FInd min mass so that block loses contact with ground. Spring is initially in its natural length, the mass attached to spring is on ground(M) Homework Equations Equations of conservation of energy The Attempt at a Solution Min compression = 2mg/k to lift up object, Normal...

What determines the maximum amount of weight an electric motor can lift / move for its size? So assuming the electric motor weighs a specific amount, what would be the limiting factor to how much weight it can move / lift for the weight it weighs?

I am conducting a school based EEI and have found issues in predicting lift on an aerofoil with respect to angle of attack.I understand the formula for lift is L = (1/2) d v2 s CL. I also understand there are many confusing variations to the calculation for the lift coefficient but i am yet to...

I am making a small project at home for my solar panels. I have made a similar project when I was in school but I can't remember the equations. I want to attach an air compressor to a tube then install it on top of a solar panel, and pinch a few holes in it to clean the dust that accumulates...

How much air pressure, from six 1inch in diameter pipes, would it take to lift something no more then 250 pounds about six to twelve inches off the ground?P.S. This is a personal question not, homework.

I'm no physics major... And I have no formal education... I just have a task that I wonder if could be possible... Could a feather lift a car? Could you use the weight of a feather and the proper lever system or systems to lift a standard sized car off the ground?