l3p - Today Announcements HW#2 is due Wednesday by 8:00 am...

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ISP209s8 Lecture 3 -1- Today • Announcements: – HW#2 is due Wednesday by 8:00 am – Extra Credit project #1 in on the LONCAPA website is also do next Wednesday at 8:00 am •R ev i ew • What is Force? Introduction ISP209s8 Lecture 3 -2- Scalars, Vectors, and Tensors (Stress tensor) • Stress is defined as the force per unit area. • In a solid object each point has three values of stress (up, left, right) • The stress tensor describes the stress at all points in an object http://en.wikipedia.org/wiki/Image:Stress_tensor.png ISP209s8 Lecture 3 -3- Motion Position – location relative to the center of a coordinate system (0,0). 2 miles NE Displacement – the difference between two positions Velocity – rate of change of position. This means changing direction as well. Acceleration – rate of change of velocity. If either

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l3p - Today Announcements HW#2 is due Wednesday by 8:00 am...

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