research & investigation

 FORCES

compression:
 compresion is the force that squeezes a material together. when a material is in compression it tends to become shorter.

tension/streaching:
 tension is a force that streches a material apart.when a material is tension it means that that the material tends to strech or get bigger.

twisting: torsion or twisting is an action that twists the material.

shear: shear/ or sliding is a force that causes a part of material to slide past one another in opositte directions.