Forces and Friction

A force is simply a push or a pull

• Gravity or Weight always acting straight downwards
• Reaction force from a surface, usually acting upwards
• Electrostatic force between two charged objects. the direction depends on the type of the charge (liek charges repel, opposite charges attract)
• Thrust or push or pull due to an engine or rocket speeding something up
• Drag or air resistance of friction which is slowing the thing down
• Lift due to an aeroplane wing
• Tension in a rope or cable

You can draw the forces acting on a body

• Chances are, there are loads of forces acting on you right now, that you dont even know about. You don't notice them because they all balance out
• Any object with a weight feels a reaction force back from the surface it's on. Otherwise it would just keep falling
• When an object moves in a fluid (air water etc).it…