Final answer:
The question involves understanding safety measures at 1.2 metres off ground level, which include fall arrest systems, anchorage points, clearance height, and retractable lanyards, within the context of Physics.
Step-by-step explanation:
The given question seems to be related to safety measures while performing an activity that requires an individual to be elevated above the ground, specifically at 1.2 metres off ground level or another safe lower surface. Such safety measures include a fall arrest system to prevent or minimize injury in the event of a fall, an anchorage point to which the fall arrest system is secured, determining the clearance height needed in case of a fall, and the use of a retractable lanyard, which is part of a fall arrest system that extends and retracts automatically to provide mobility while minimizing the risk of falling. It is crucial to calculate the forces involved and potential risks when working at heights to ensure the appropriate safety systems are in place.