A tiny crack develops in an oil tank and a jet of oil is forced out through the crack. The oil strikes the floor at P, where a puddle of oil begins to spread. Fig. 2.1 shows the oil tank. The gravitational field strength $g$ is $10\,\text{N kg}^{-1}$. The density of the oil is $940\,\text{kg m}^{-3}$ and the crack is $3.3\,\text{m}$ below the oil surface.
(a(i))[2]
Calculate the pressure caused by the oil at the level of the crack.
(a(ii))[1]
Explain why atmospheric pressure has no influence on the rate at which the oil is forced out through the crack.
(b)[2]
As time goes on, the place where the oil lands on the floor shifts away from P and closer to the tank. Explain why this happens.
Worked solution & mark scheme
This 5-mark question has a full step-by-step worked solution and mark scheme. One marking point: “Applies p = ρgh or works out 940 \times 10 \times 3.3” …