FORMULAE: M Fd, where d distance from force to fulcrum
T Fd, where d distance between the two forces
r m V
p F A
p gh r
pV constant p1V1 p2V2
CONCEPTS:
Definitions for moments, levers and couples Conditions for equilibrium Definitions and units for density and pressure Pressure in liquids and gases Archimedes’ principle and the law of flotation Boyle’s law
MANDATORY EXPERIMENTS: 5. Verification of Boyle’s law 6. Investigation of the laws of equilibrium for a set of co-planar forces
ACTIVITIES:
Demonstration of atmospheric pressure Demonstration of Archimedes’ principle
SCIENCE,TECHNOLOGY AND SOCIETY: Torque (doors and taps) Couples (handlebars on bicycles, moving-coil galvanometers and simple d.c. motor) Static and dynamic equilibrium Mercury barometer Atmospheric pressure and weather The ‘bends’ in diving Hydrometers
