QJEEM15Ph2a7d: JEE Main 2015 Physics - Class 11 JEEM15Ph2a7d Solution: For a simple pendulum, a graph is plotted between its kinetic…

Question

Verified Solution • 2025–26 Session moderate

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)

A https://ik.imagekit.io/novatra/photos/e90ffd4730687f6fa49dbd4e22598df45eb0917856089e7b820c9f7a1f60bcc2.webp
B https://ik.imagekit.io/novatra/photos/510f62178dc525a3002bb9b394ec6f56139874e9f82c4d398ec354327be48aaa.webp
C https://ik.imagekit.io/novatra/photos/13174fa18013b4f32f1ecd723f584bf0a41cdaecda046116253e1c20146a953e.webp
D https://ik.imagekit.io/novatra/photos/733ea6f424336512d540ca3942a6974b8c28f3ae6833316a4e3549ddfd65280a.webp

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

Step-by-Step Verified Solution