Complete set of springs for investigating Hooke's law.

• Easy to read pointer for measuring elongation

A set of five springs with different spring constants. The hanging mass needed to produce 1 cm extension are 2.5 g, 5 g, 10 g, 15 g and 25 g respectively. Pre-stress has been removed for accurate results. With a hook to support a weight hanger and a red arrow to indicate position.