A small metal sphere is released from rest at the top of a deep cylinder filled with oil. It falls vertically under gravity and reaches terminal velocity before reaching the bottom of the cylinder.
Which statement correctly describes the resultant force on the falling sphere before it reaches terminal velocity?
decreasing and upwards
decreasing and downwards
increasing and downwards
increasing and upwards
10 exam-style questions on OCR A A Level Physics Forces in action, covering Dynamics, Motion with non-uniform acceleration, Equilibrium, and Density and pressure. Each one has a worked solution and a mark scheme showing where the marks go.