An 80.0-kg man jumps from a height of 2.50 m onto a platform mounted on springs. As the springs compress, he pushes the platform down a maximum distance of 0.240 m below its initial position, and then it rebounds. The platform and springs have negligible mass.
What is the man's speed at the instant he depresses the platform 0.120 m?
If the man just steps gently onto the platform, what maximum distance would he push it down?