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# Elastic Force Objects can be divided into two different groups: elastic and inelastic. Elasticity is the property of solid materials to return to their original shape and size after the deforming forces have been removed. An elastic object is an object that has the ability to return to its orig...

# Elastic Force Objects can be divided into two different groups: elastic and inelastic. Elasticity is the property of solid materials to return to their original shape and size after the deforming forces have been removed. An elastic object is an object that has the ability to return to its original position, while an inelastic object does not. If a spring is compressed or expanded by hand, a force acts on the spring. The force that changes the spring's shape is the external force, and the force that tries to return the spring to its original shape is the elastic force. These two forces are equal in magnitude but opposite in direction. The greater the force acting on the object, the greater its deformation (or extension). Most often, "extension" will be replaced with the symbol (Δx), "force" with (F), and "is directly proportional to" with an equal sign and a constant of proportionality (k). If we want to show that the spring is trying to go back to its original shape, we add a negative sign. The equation can be written as: $F = -k\Delta x$ The minus sign indicates that the elastic force acts in the opposite direction to the applied force on the object. **Examples of Elastic Objects:** * Hair scrunchies * Elastic waistband * Rubber band * Resistance band