Consider the potential energy graph shownThis graph is for a 2 kg object. At t=0 youare located at point D and moving with aspeed of 6 m/s10090 AK(JHBFind the total mechanical energyDCompare the speed at each of thelabeled pointsLocate any turning points. (They arenot necessarily on the labeled points.)F20G10001235678 910 114Position (m)Potential Energy (J)

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Step 1

The total mechanical energy at point D for t=0, and be calculated as,

Step 2

From the above it can be inferred that when the potential energy increases, the kinetic energy decreases. Thus, the speed also decreases.

From the graph, the speed at each of the labeled points can be compared as,

Step 3

Consider any turning point t. At the turning point, the speed will be zero. So, the kinetic energy at this point wi...

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