PHYSICS
Describe an experiment to determine the density of a liquid and of a regularly shaped solid and make the necessary calculation using the equation density = mass / volume or d = m / v.
Know that a force is measured in newtons (N).
Describe how forces may change the size, shape and motion of a body.
Plot extension / load graphs and describe the associated experimental procedure.
Interpret extension / load graphs.
State and use Hooke’s Law and recall and use the expression force = constant × extension (F = k x)
Recall and use the relation between force, mass and acceleration (including the direction).
Find the resultant of two or more forces acting along the same line.
Explain how a system is in equilibrium when there is no resultant force.