Physics for IGCSE & O level - Forces And Pressure (Section 1 - No. 9)
What defines the 'elastic limit' of a material?
The point at which the material breaks.
The point at which the material begins to permanently deform.
The point at which Hooke's Law is no longer valid.
Both b and c
Giải thích
The elastic limit marks the onset of permanent deformation and the limit of Hooke's Law.