Contact and Non Contact Forces

• Different types of forces?

  Contact: Non contact:

  Friction GPE

  Tension Electrostatic

  Air resistance Magnetic
• Forces are vector quantities as they have size and direction

  Therefore a force can be represented by an arrow where the length of the arrow is the size and the direction

  Scalar quantities only have size
• Weight is the force of gravity acting on an object, measured in newtons (N)

  Mass is the amount of matter in the body
• Resultant force explained with the Newtons law but like

  <------ 5N ----------> 10N

  Resultant force = 5N Right