To prevent a heavy mobile crane from sinking into soft soil, its support legs (outriggers) are placed on large, flat timber mats.
Why does placing the support legs on these mats prevent them from sinking?
The large area of the mats decreases the pressure exerted on the soil.
The large area of the mats increases the pressure exerted on the soil.
The large area of the mats decreases the weight of the crane on the soil.
The large area of the mats increases the weight of the crane on the soil.
188 exam-style questions on CIE IGCSE Physics Pressure, covering Pressure. Each one has a worked solution and a mark scheme showing where the marks go.