Contact and Noncontact forces
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| Force | something that can change the motion of an object.
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| Contact force | a force that directly touches an object.
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| Non-contact force | a force that is not touching an object; has a field that weakens with distance.
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| Types of contact forces | friction, applied, normal
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| Types of non-contact forces | gravity, magnetism, electricity
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| Friction | an opposing force that resists motion.
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| Applied force | a push or a pull force.
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| Normal force | a force perpendicular to the point of contact.
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| Gravity | force of attraction between two masses.
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| Magnetism | force of attraction between two charged particles.
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| Electrical force | movement of electrons that creates a magnetic field around a conductor.
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| Items to describe a normal force | perpendicular to a surface; only works in contact to a surface.
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| Items to describe frictional force | parallel to the surface; only works in contact to a surface; opposes motion; must work in gravity.
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| Items to describe an applied force | a push or a pull; works parallel to the surface; can work without gravity;
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| 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.
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| Items to describe magnetic force | increases with mass; decreases with distance; stronger at the poles; weaker along the sides; typically metals.
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| 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.
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Created by:
sdscience6
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