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Force Review

Contact and Noncontact forces

QuestionAnswer
Force something that can change the motion of an object.
Contact force a force that directly touches an object.
Non-contact force a force that is not touching an object; has a field that weakens with distance.
Types of contact forces friction, applied, normal
Types of non-contact forces gravity, magnetism, electricity
Friction an opposing force that resists motion.
Applied force a push or a pull force.
Normal force a force perpendicular to the point of contact.
Gravity force of attraction between two masses.
Magnetism force of attraction between two charged particles.
Electrical force movement of electrons that creates a magnetic field around a conductor.
Items to describe a normal force perpendicular to a surface; only works in contact to a surface.
Items to describe frictional force parallel to the surface; only works in contact to a surface; opposes motion; must work in gravity.
Items to describe an applied force a push or a pull; works parallel to the surface; can work without gravity;
Items to describe gravitational force increases with more mass; decreases with distance; happens between any two pieces of matter; has a field; spreads out equally in all directions.
Items to describe magnetic force increases with mass; decreases with distance; stronger at the poles; weaker along the sides; typically metals.
Items to describe an electrical force increases with mass; decreases with distance; stronger at the poles; weaker along the sides; can turn metals into a magnet; jumping electrons.
Created by: sdscience6
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