Elasticity and Spring Extension

• Provide examples of the forces involved in stretching, bending, or compressing an object.
• Explain why changing the shape of a stationary object requires the application of more than one force.
• Differentiate clearly between elastic deformation and inelastic deformation caused by stretching forces.
• Understand that the extension of an elastic object is directly proportional to the applied force, provided the limit of proportionality is not exceeded.
• Calculate force, spring constant, or extension using the equation:

$F = k e$

• Identify the units for force (newtons, N), spring constant (newtons per metre, N/m), and extension or compression (metres, m).