An automated storage crane has a total weight of 15 600 N15\,600\text{ N}15600 N. The crane is supported by six feet, each with a flat contact area of 13 cm213\text{ cm}^213 cm2 resting on a metal track.
Calculate the pressure exerted by the crane on the track.
Answer = ____________________ N/cm2\text{N/cm}^2N/cm2
Fall-arrest safety harnesses worn by wind-turbine maintenance technicians are made of wide straps that stretch slightly if a technician falls.
Explain why it is important that the harness straps are wide.
Explain why it is important that the harness material is stretchy.
Junior safety harnesses designed for children are made with narrower straps than those used for adults.
Explain why it is safe for children's harnesses to be narrower than adult harnesses.