Ten questions. The result tells you which lessons you may skip.
A metal cube hangs fully under water on a string. It is lowered from \(1\,\text{m}\) below the surface to \(3\,\text{m}\) below. The buoyant force on it
An iron ball and a wooden ball of the same volume are both held fully under water. The buoyant force is
A stone weighs \(40\,\text{N}\) in air and has a density of \(4000\,\text{kg/m}^3\). Its apparent weight fully under water is
A boat of mass \(300\,\text{kg}\) floats on a lake. The volume of water it displaces is
A block of wood of density \(750\,\text{kg/m}^3\) floats in water. The fraction of its volume under the surface is
A body weighs \(12\,\text{N}\) in air and \(8\,\text{N}\) fully under water. Its relative density is
A beaker of water stands on a scale that reads \(30\,\text{N}\). A block hanging from a spring balance is lowered into the water, and the buoyant force on it is \(4\,\text{N}\). The scale now reads
An ice cube floats in a glass of water filled to the brim. As the ice melts, the water
A block floats in a bucket of water with half its volume under. The bucket is in a lift that accelerates upward at \(5\,\text{m/s}^2\). Now the fraction of the block under water is
A floating boat is in stable equilibrium when