Mechanical Expressions Beta
 Mechanical Expressions
is a new program, based on the same geometry engine which allows you to
create explicit mathematical models of mechanical phenomena.
We showed Mechanical Expressions at the ASME Convention in San Diego and got some interesting feedback.
Interested in checking it out? Want to give us your own feedback?
Mechanical Expressions is in open Beta, and a copy can be downloaded from here.


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How to... do kinematics in Mechanical Expressions
 A crank slider has crank velocity w. What is the velocity of the slider?
Here's how we do this in Mechanical Expressions
 Draw the triangle ABC, positioning A at the origin and C on the x axis.
 Constrain
the lengths of AB and BC and the angle BAC. As the angle changes,
AB will rotate around A while C slides back and fort
 h along the x axis.
 Select the Angle and use Mechanics Input / Velocity/A
cceleration. Specify a velocity of w and leave the acceleration zero.  Select point C and use Mechanics Output / Velocity Acceleration. You will get the velocity and acceleration of the point.

Problem of the Month

Points A, B and C lie on a smooth closed curve such that triangle ABC
has sides with maximal sum of squares. Show that the medians of
ABC are normal to the curve.
An app which lets you explore this problem is here.
Think you know the answer? Post it to our or pages! 



eBooks

A breakthrough in the use of interactive diagrams for gaining new insight into mathematics. Available on iTunes Each group of apps consists of simple, short, and focused interactive demonstrations and explorations of a single standard. Available on iTunes
L Van Warren has combined Geometry Expressions apps with the Kindle in his latest eBook available from amazon.com here
 11 Geometry Expressions eBooks are now available as a bundle for the recessionfriendly price of $85.95


