An elastic safety buffer in a train coupling system is compressed by a compressive force FFF. The buffer behaves as an ideal spring obeying Hooke's law with spring constant kkk. At maximum compression, the elastic potential energy stored in the buffer is UUU.
Determine an expression for the spring constant k k\,k in terms of U U\,U and FFF.
15 exam-style questions on OCR A A Level Physics Materials, covering Springs and Mechanical properties of matter. Each one has a worked solution and a mark scheme showing where the marks go.