AEM 2021 Lecture Notes - Lecture 28: Conservative Force
17 May 2017
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Document Summary
Conservative force is work expressed in the form. Where v is the potential energy, v1 is the starting position, and v2 is the ending position. This says the sum of kinetic and potential energy is the same at the starting and ending points. The sum is called the total (mechanical) energy. Note that conservative forces are independent of path between start and end. Since friction depends on path, it is not conservative. We can always add a constant to v. For weights can choose reference level (origin) (datum) May need to supplement nsl to find force(s) Any force that does zero work can be neglected (zwf) Find velocities at b and c. find forces on collar. Neglect friction (hint that we can use conservation of total energy). Find the smallest value of the starting velocity so the package will reach c.
