Weight of the plane
There is a plane how do you find the weight of the plane without using a scale.
Samuel Broadwell
Samuel Broadwell
Labels: SharedPuzzle
posted by Rajesh Lal at
2:54 PM
Wednesday, December 3, 2008
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35 Comments:
use a balance
drop a nuke on it
Deflate the tires. It takes x amount of pressure to inflate the tires while they are attached to the plane. Using some mathematical formula that some number junkie will post later. You figure the compressor pumps out X amount of psi's and using the formula that has yet to be determined you can figure the weight of the plane by how much pounds per square inch the plane is putting pressure on it.
This is either the correct answer or an illogical guess meant to sound smart. hehe
Force equals mass times acceleration.
Get the force from the engine thrust. Get the acceleration from timing the plane as it goes down the runway. Divide this into your number for force to get the plane's mass.
This ignores things like wind resistance, but what the hell?
mass x gravity(9.81)=weight
you get a balancer and a bunch of reeeealy fat people and see where it starts to balance at
For each tire, measure the square inches touching the ground, measure the tire pressure in pounds per square inch. Multiple the square inches on the ground time the preasure. This will give the weight the tire is holding up. Add the results for each tire to get the total weight of the plane.
hjg
they never said it was an air plane what if it is a plane of grass like a meadow
Cut the plane into one pound pieces, then count the pieces.
a plane like a meadow? That would be a plain, not a plane. It could be a mathematical plane, three points determince a plane, with no thickness, and then no weight.
Anonymous said, "cut the plane into one pound pieces, then count the pieces." how do you know how much a one pound piece ways without using a scale?
Easy, contact the manufacturer of the plane.
It's the sort of thing they make notes on when they make them.
I'm sure they will have the answer somewhere to hand, and could save you a lot of time trying to work it out yourself.
Always happy to help.
P.S. Merry Xmas and a happy new year.
drop it in the ocean and calculate its displacement
Get the weight of each and every part from who ever made them and add them together.
Lift the plane up with one hand. In the other hand, lift something whose weight you know. Compare the two and guess.
find out how much one cubbed foot of material is for every type of material used in the plane then multyply the weight of that one foot peice be the amount of material used
Oo!
I just noticed, the question said you could use a scale to weigh the plane.
Obviously they were thinking of a snakes scale (not sure why the questioner would want to weigh a plane with a snakes scale, just wierd i guess).
So you could use some common kitchen or bathroom weighing scales, you might need more than one set unless it's one of those small model planes in which case one would probably do.
Still happy to help. :)
Do snakes have scales?
If not then my second answer may just be gibberish.
use the lift equation
L=(coeffecient of lift)*(the dencity of the air)*(the surface area of the top part of the wings)*(the absolute Value of its velocity)
Lift is opposite of its weight so when the plane just leaves the ground that lift force is how much it weighs
F=ma
Find all forces and add them together to get Fnet. Then thrust the plane fully forward to get acceleration. Plug values into F=ma. Multiply the mass you get by 9.8 to get weight.
Just a guess!! Please tell me if you think this will work :)
READ THE MANUAL gawd...does no one ever do that these days
You could measure the mass in any number of ways. There are hundreds of formulas in physics that use mass. Assuming you know all the other variables then they are just as easy as F=ma.
You could use:
E(potential) = mgh
E(kinetic) = .5mv^2
F = (G[univeral gravitational contant]*M1 * M2) / d^w
E = mc^2
... and the list goes on...
what about trying to put the plane to the air and calculate the used throttle or force needed to lift the plane up
how about using a scale model in a container of water to determine displacement, therefore, determining its mass, then multiplying by gravity to acheive weight??
how about using a scale model in a container of water to determine displacement, therefore, determining its mass, then multiplying by gravity to acheive weight??
Get the spec manual, skip the part about the weight of the plane, get the take off speed, then find the area of the wing tops. Using the takeoff speed and the lifting area, you can compute the weight of the plane.
Then check that computation with the given spec weight.
im a science boff... so i say:mass x gravity = WEIGHT...duh
im a science boff... so i say:mass x gravity = WEIGHT...duh
you could measure the cord of the wing and the wing area and the speed at which the plane takes off which would let you calculate the amount of lift needed to fly which should equal the amonut of wieght for the plane
weight?
or mass?
find density, rearrange,
m=dxv
work out the volume, than, if needed, x mass by 10 to work out weight.
I'd look in the owner's manual.
Look in the pilots operating handbook,find the empty wight, then if there's fuel in the plane, multiply the number of gallons by 6 to find the wight of fuel.
google it XD hahahahaah (im such a smartass)
get the plane to fly in a circle, then use a spring (f=kX) to measure centrapetal force, and then use cirular motion equations f=m.r.w^2
r=radius w=angular speed
this assumes u know the radius the plane is flying in (shouldn't be too hard to work out), and that you can time the rotation of the plane
In order to figure out the weight, we must first define the term weight. For this case, we will say it is the force earths gravity imparts on the plane.
---now---
if the plane is flying, it has no/negative weight. the force of lift cancels out the force of gravity on the plane and pulls the plane upward.
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