Forces and Elasticity

• Explain the relationship between the force applied and the extention of an elastic object.

  The extension is directly proportional to the force applied until elastic limit is reached.
• What is meant by inelastic deformation?

  A deformation which results in the object being permanently stretched.

  The object won't return to its original shape when the force is removed.     
• What is the equation that links force, spring constant and extension? 

  Force (N) = Spring Constant (N/m) × Extension (m) 
• What type of energy is stored in a spring when it is stretched?   

  Elastic Potential energy.
• What can extension be replaced with in the equation for spring force? 

  Compression