Work, Power and EnergyHard
Question
For a simple pendulum, a graph is plotted between its kinetic energy (KE) and potential energy (PE) against its displacement d. Which one of the following represents these correctly ? (graphs are schematic and not drawn to scale)
Options
A.

B.

C.

D.

Solution
KE =
mω2[A2 - d2], downward parabola
PE =
mω2d2, upward parabola.
KE
PE
PE =
KE

PE

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