B3 Equilibrium and simple machines

14 Feasible experiments.

• Know the forces
• How to sum forces
• The parallelogram rule
• The resultant of parallel forces having same direction
• How to use our strength intelligently
• Equilibrium of a rod
• Simple machines
• First class of lever
• Second class of lever
• Third class of lever
• Some examples of levers
• Pulleys
• Fixed pulley
• Movable pulley
• Simple tackle
• Inclined plane