Lesson Plan: P2.1.05

Hamble Lesson Observation Plan
Learning About
What happens to an object when it is stretched?
Keywords:
  • Stretching (2)
  • Directly proportional (1)
  • Elastic (1)
  • Extension (1)
  • Limit of proportionality (1)
  • Spring constant (1)
  • Non-linear (1)
  • Linear (1)
  • Inelastic deformation (1)
  • Stationary (1)
  • Compression (1)
  • Compressing (1)
  • Bending (1)
  • Work done (1)
  • Elastic potential energy (1)
  • Forces (1)
  • Energy store (1)
  • Elastic deformation (1)
Memory Anchor:
Method Precise Learning Objective Linked Question / Activity
(Designed for maximum working out)		 Stepping Stones Pitstop Check
(Thinking Map)
Students should be able to give examples of the forces involved in stretching, bending or compressing an object What forces are involved in stretching, bending or compressing an object?
A force that stretches (or compresses) a spring does work and elastic potential energy is stored in the spring.

Students should be able to explain why, to change the shape of an object (by stretching, bending or compressing), more than one force has to be applied ? this is limited to stationary objects only Why, to change the shape of an object (by stretching, bending or compressing), does more than one force have to be applied?
Provided the spring is not inelastically deformed, the work done on the spring and the elastic potential energy stored are equal. What is the relationship between the work done on the spring and the elastic potential energy stores?
Students should be able to describe the difference between elastic deformation and inelastic deformation caused by stretching forces. What is the difference between elastic deformation and inelastic deformation caused by stretching forces?
The extension of an elastic object, such as a spring, is directly proportional to the force applied, provided that the limit of proportionality is not exceeded. What is the relationship between extension and force for an elastic object, such as a spring?
(MS) force = spring constant ? extension F = k e force, F, in newtons, N spring constant, k, in newtons per metre, N/m extension, e, in metres, m This relationship also applies to the compression of an elastic object, where ?e? would be the compression of the object. What is the equation that links force, spring constant and extension? Include SI units.
Students should be able to describe the difference between a linear and non-linear relationship between force and extension What is the difference between a linear and non-linear relationship between force and extension?
Links To the Big Ideas
ForcesParticlesEnergyCells