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8th gr Forces
Term | Definition |
---|---|
force | the push or pull on matter that enables that matter to CHANGE in motion (aka: accelerate) and interact; the means in which that energy is transferred |
contact forces | require actual touch or contact to interact with matter |
non-contact | exist without touch or contact and still influence matter |
applied force | force that is directly applied to object; contact force |
normal force | support force; contact force |
friction | force of surface resistance against an object's motion along it; contact force |
gravitational force | force of ATTRACTION between MASSES of matter; non-contact force |
magnetic | force of ATTRACTION or Repulsion between CHARGES of matter; increase distance = decrease magnetic force; non-contact force |
cohesion | the attraction force between molecules of the same substance |
adhesion | the attraction force between unlike molecules of different substances |
surface tension | the inward force of every single droplet of water; due to cohesive forces pulling inward |