Which calculation below gives the displacement -X a [Spring length]-[mass] b [Mass]-[spring length] c [Original length]-[spring length] d [spring length]-[original length]

The correct answer is:<br /><br />d) $[spring\quad length]-[original\quad length]$<br /><br />Explanation:<br />Displacement is the difference between the original length of the spring and the stretched or compressed length of the spring. Therefore, the correct calculation for displacement $-X$ is the difference between the original length and the spring length.