Forces and Hooke in simple bullet points.

A force of one Newton will make a mass of one kilogram accelerate at one metre per second squared.
The gravitational force is called weight.
A vector quantity has both a force and direction.
Quantities with no direction associated with them are called scalar quantities.
All materials will stretch a little when you put them under tension.
Materials that do not change shape easily are brittle, they break rather that stretching.
Resilient or elastic materials do not break easily and tend to return to their original shape when the forces acting upon them are removed.
Other matterials such as putty are not resiliant but plastic, and they change shape permanently when even small forces are applied to them.
The unbalenced force is when there is a larger force in one direction than another.
A balenced force is when forces acting in opposite directions are equal, this either means the object is stationary or is…

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