Question 125: Oscillations

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?
$(graphs$ $are$ $schematic$ $and$ $not$ $drawn$ $to$ $scale)$

Accepted Answer

$K.E = {1 \over 2}k\left( {{A^2} - {d^2}} \right)$
and $P.E. = {1 \over 2}k{d^2}$
At mean position $d=0.$ At extremes positions $d=A$

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Oscillations

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)

Choose the correct answer: