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The length of the vector gives the speed of rotation and the direction of the axis gives the direction of rotation according to the right-hand rule: right fingers curled in the direction of rotation and the right thumb pointing in the positive direction of the axis. This allows some simple calculations using the vector cross-product.
To apply the right-hand rule, place one's loosely clenched right hand above the object with the thumb pointing in the direction one wants the screw, nut, bolt, or cap ultimately to move, and the curl of the fingers, from the palm to the tips, will indicate in which way one needs to turn the screw, nut, bolt or cap to achieve the desired result.
While thumb twiddling comes naturally for almost everyone, it is extremely rare for people to be able to naturally contra-rotate their thumbs without spending a significant amount of time training the new technique. [3] Typically, a person will get through a half rotation before both of the thumbs will inexplicably synchronize directions.
Download as PDF; Printable version; ... Pages in category "Rules of thumb" ... Rule of twelfths; S. Scott's rule; Sturges's rule; Sunny 16 rule;
Talk about a tale of two cities. A new report calls New York one of the best cities in the country for an active lifestyle — while a spot right across the Hudson River ranks as one of the worst ...
In 2 dimensions the curl of a vector field is not a vector field but a function, as 2-dimensional rotations are given by an angle (a scalar – an orientation is required to choose whether one counts clockwise or counterclockwise rotations as positive); this is not the div, but is rather perpendicular to it.
Let’s set the table for what’s sure to be a thrilling conclusion between the top seeds in the tournament by considering three big questions ahead of Tuesday’s NBA Cup championship (8:30 p.m ...
The NBA and commissioner Adam Silver were eager to make changes to the All-Star Game after last year's contest wasn't very competitive and finished with a final score of 211-186.