Stretching springs: F = ke explained

Video coming soon

The key ideas and the summary sheet for this lesson are ready now.

Changing an object's shape needs more than one force.
Elastic objects return to their original shape; inelastic ones do not.
F = k e: force (N) = spring constant (N/m) × extension (m), up to the limit of proportionality.
Work done stretching a spring is stored in its elastic potential energy store.