A-Level Physics OCR A H556

3.4.2: Mechanical properties of matter

#3.4.2a

force–extension (or compression) graph; work done is area under graph

#3.4.2b

elastic potential energy; $E = \dfrac{1}{2}Fx$ ; $E = \dfrac{1}{2}kx^2$

#3.4.2c

stress, strain and ultimate tensile strength

#3.4.2d

(i) $\text{Young modulus} = \dfrac{\text{tensile stress}}{\text{tensile strain}}$ , $E = \dfrac{σ}{ε}$

(ii) techniques and procedures used to determine the Young modulus for a metal

PAG2

#3.4.2e

stress–strain graphs for typical ductile, brittle and polymeric materials

#3.4.2f

elastic and plastic deformations of materials.

PAG2

3.4.1

Springs

3.5.1

Newtons laws of motion