User:Subhash15/Trial2

This is user subpage 2

Will be used for experimentation

change over to through shortest to shorter

Change "shortest" to "shorter" and "over" to "through"

There are two and only two possible arcs for measuring the angle from a to b, one sweeping clockwise, the other counterclockwise. With only two possibilities "shorter" is the appropriate adjective. If clockwise sweep is shorter, then counterclockwise sweep is longer, and vice-versa. "through" is probably is a better usage compared to "over".

Add "clockwise and counterclockwise"

There are two and only two possible rotations in the coordinate planes: so at least for engineering computations, these two senses, clockwise and counterclockwise ought to be incorporated in the definition. Any one inclined to edit this out ought, in the very least state if there are more possibilities in 3-dimensional space, that is 3 coordinate planes.

Add phrase "by choosing the shorter angle, 90 degrees clockwise or counterclockwise"

There are two and only two choices in determining y-axis with known or arbitrarily chosen x-axis one rotating 90 degrees clockwise, other 90 degrees counterclockwise. If someone decides to edit this out, he/she has the obligation to suggest other possibilities of determining the y-axis. This edit is in preparation for adding, to this article:

"Alternate Engineering Definition of Left and Right-hand rules for orthogonal Cartesian Coordinate Systems"

and eventually add to the Cross Product article unambiguous and unique correlation between sign of torque and rotational sense, i.e. clockwise or counterclockwise.

Surface Normal Outward Normal Left and Right hand rules

Re: Article Surface Normal

The word "outward" was edited out of the caption of the image with the advice to stay away from that adjective. However S. P. Timoshenko, recognized as the father of Engineering Elasticity, in his book Theory of Elasticity uses the symbol "N" to represent "outward normal to the surface of a body" The images in the book showing normals are exactly identical to the image in the article.

If an outward normal is to be recognized, shouldn't an inward normal be also recognized? The inward normal vector represents a pressure

If one of the two normals is determined by the Right-hand rule, isn't the other normal, in the opposite direction, uniquely determined by the Left-hand rule?

Trying Plane (mathematics)

Article Plane (mathematics)Subhash 16:19, 20 June 2006 (UTC)