First slide

Concept of potential energy

Question

The potential energy of a weight less spring compressed by a distance a is proportional to

Easy

A

a
B

a²
C

a^-2
D

a⁰

Solution

Potential energy of spring = $\frac{1}{2} {Kx}^{2}$
$∴ PE \propto x^{2} \Rightarrow PE \propto a^{2}$

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