19,879
edits
Changes
no edit summary
: Some [[force]]s can act at a distance, but a '''contact force''' only exists when [[object]]s are in '''contact'''.
The '''contact forces''' you should know are:
*[[Friction]]
*[[Air Resistance]]
*[[Water Resistance]]
*[[Upthrust]]
*[[Driving Force]]
*[[Thrust]]
*[[Lift]]