A student wants to find the position of the centre of gravity of an irregularly shaped flat sheet of cardboard. The following equipment is available to the student:
Which piece of equipment is not needed for this experiment?
Electronic balance
Pin
Plumb line (weight on a thin string)
Pencil and ruler
19 exam-style questions on CIE IGCSE Physics 1.5.3 Centre of gravity and stability. Each one has a worked solution and a mark scheme showing where the marks go.