I. Forces and Free Body Diagrams A. There are two broad types of forces: non-contact and contact forces. Non-contact forces, such as gravity, do not require contact, while contact forces, such as a push or a pull, do require contact. For all the forces below indicate whether they are contact or non-contact forces. Force 1 Contacton-contact? .' Force : ContacUnon-contact? Friction Normal force Gravity ' I Tension (force in a rope) . Magnetic force