5. A spring with a spring coefficient k is positioned vertically on the ground, with its upper end attached to a stationary object of mass m'. An object of mass m falls freely from a height h above the top of the spring, undergoing a perfectly inelastic collision with m'. Prove that the maximum pressure exerted by the spring on the ground is Fmax = (m + m')g + 2kh mg 1+ (m+m')g