1R10  Hooke's Law

1R10.10 Hooke's Law

1R20  Tensile and Compressive Stress
1R30  Shear Stress
1R40  Coefficient of Restitution

1R40.10 Bouncing Balls
1R40.30 Dead and Live Balls

1R50  Crystal Structure

1R50.20 Bravais Lattice Models
1R50.20 Crystal Models