Flexible planar frame is made of 7 rigid rods, connected at their ends by bearings? - desk tripod
http://alexandersemenov.tripod.com/ya/vr ...
The frame can slide on the tray table.
Two red beams of length 30 can rotate around a fixed point and a long green bar 2 can rotate around fixed bridge B | AB | = 34.
The length of four blue bars is 18 years each.
What is the area of the loop produced by the Common C, after the green bar finishes a revolution?
Desk Tripod Flexible Planar Frame Is Made Of 7 Rigid Rods, Connected At Their Ends By Bearings?
2 comments:
This is a link Peaucellier real estate investments, which means that the trace is from another circle C. What is the diameter? Well, fiddle around a little math of Pythagoras. Let x = 1 / 2 the distance between the ends of the 2 red bars. Then we learned that if x is the end of the relationship is at 32 minutes and 36 R. find a few equations to connect to the on / max distance from A to C, the 16 and 18 sheets. The difference is the diameter of the circle, drew the C, and the area is π.
Addendum: Good work, Dr. D.
Let variable r = distance between C and A
θ = elevation angle of the CA from the first position of
After all the painstaking work can be shown that
r ^ 2 = (290 - 578sin θ ^ 2) + / - sqrt [(290 - θ 578sin ^ 2) ^ 2 A 288 ^ 2]
A key to ensuring this relationship is the recognition of the geometry of A, C and F must always be aligned with F connected to the other end of these 2 pieces long connection to B
The range of C can be represented by the double integral required to calculate the
* R * D r dθ between the limits
r ^ 2 = (290 - 578sin θ ^ 2) - sqrt [(290 - θ 578sin ^ 2) ^ 2 A 288 ^ 2]
and
r ^ 2 = (290 - 578sin θ ^ 2) + sqrt [(290 - θ 578sin ^ 2) ^ 2 A 288 ^ 2]
And θ =- asin (1 / 17) for θ = + arcsin (1 / 17)
It ends with the integration
Integral 34 * sqrt (1 - θ 289sin ^ 2) * cosθ dθ
is
asin (17sinθ) + 17 * sinθ * sqrt (1 - θ 289sin ^ 2)
Apply borders π
If he known beforehand that the locus of a circle C () instead of an ellipse, so it is harder than the diameter of the search2. If you do not know it would be a circle, then you would do what I did.
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