Rev. Notes > IGCSE > Forces Previous Topic Forces Next Topic Topics
 Force Effect of force Friction Balanced forces Unbalanced forces Addition of forces Newton's firts law of motion Newton's second law of motion Newton's third law of motion Circular motion Circular motion - Examples Center of mass Hook's law Hook's law (Elastic behaviors) Hook's law (Plastic behaviors) Hook's law - Elastic limit Effects of applied force on the materials Moment of force Priciple of moment of force Equilibrium Conditions of equilibrium

## Force

Force is a push or pull.

SI unit of force is kg m/s2 or Newton (N)

According to the Newton's second law of motion

Force = mass X acceleration

F = m a

To describe a force fully you must state the size of the force(magnitude) and also the direction in which it is trying to move the object.

The direction can be described as left, right, upwards, downwards, north, south etc.

Forces acting in one dricetion can be added to get the resultant force.

Forces acting in the opposite dricetion can be subtracted to get the resultant force.

 wweerre Said : all r coooo 15/08/14 09:04 AM

 Aroosha Pervaiz Said : spend plumb line 4rm whr it is hanged upp 21/04/13 03:43 PM

 Aroosha Pervaiz Said : @GHAOST SPEND A PLUMB LINE FROM WHR IT IS HANGED UP 21/04/13 03:40 PM

 Aroosha Pervaiz Said : @ghost the point from where it is hanged up 26/01/13 04:36 PM

 Ghost Said : Could you explain this :Suspend a plumb line from the same place. Thanks for your help. 11/05/12 06:08 AM