The potential energy of a weight less spring compressed by a distance $ a $ is proportional to
The potential energy of a weight less spring compressed by a distance $ a $ is proportional to
$a$
${a^2}$
${a^{ - 2}}$
${a^0}$
The potential energy of a weight less spring compressed by a distance $ a $ is proportional to
Potential energy of spring = $\frac{1}{2}K{x^2}$
$PE \propto {x^2}$$⇒$ $PE \propto {a^2}$