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25-05-2008, 10:56 | ||
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I want a trip inside your head, spend the day there..
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25-05-2008, 13:10 | |
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A simple mechanical model of the human arm consists of two rigid bodies connected by three hinges.
The space ¯xed coordinate system is, seen from a human perspective looking straight ahead North, the z-axis up, the y-axis North, and the x-axis East. The arm is an open loop structure with, starting from the torso, a hinge with an angle ® about the x-axis, a hinge with an angle ¯ about the y-axis, the upper arm with length d = 30 cm in the minus z-direction, a hinge with an angle ° about the x-axis, and ¯nally the lower arm with length e = 40 cm in the plus y-direction. The location of the imaginary hand at the endpoint is now (0; e;¡d) with all angles ®, ¯, and ° equal to zero. The upper arm has a concentrated mass of md = 3 kg at a distance d=3 from the shoulder whereas the lower arm has a concentrated mass of me = 3 kg at e=2 from the elbow. We neglect the mass moments of inertia. We assume gravity to work in the minus z-direction with a ¯eld strength of g = 9:81 N/kg. |
25-05-2008, 13:46 | ||
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^^ voor straf druk ik me weer lekker uit in smilies
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Dit is een coole sig.
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25-05-2008, 14:17 | ||
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Vrijdagavond in LVC had ook iemand een bellenblaas meegenomen en dat was dikke pret.
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Stephen enjoys cooking his godchildren and leaving out commas.
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