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Forces Level 1

All the terms you need to know for Level 1 of the Forces Menu

force a push or a pull
magnetism a force that can attract (pull towards) or repel (push away) that exists with many metal objects
buoyancy an upward force exerted by a liquid or gas. it helps boats float.
gravity an attractive force between ALL objects in the universe. it changes depending on distance and mass of the objects. (larger = stronger, farther away = weaker)
mass the amount of matter (or stuff, or atoms) in an object. it is constant even if gravity changes.
weight a measurement of how much gravity pulls on a certain amount of mass. it changes depending on gravity.
friction a force between objects that touch, which opposes (goes against) motion. it also generates heat. it can be reduced with wax or oil or grease.
spring balance (spring scale) a scientific device for measuring force.
Newtons the units for measuring force.
attract when objects pull toward each other.
repel when objects push away from each other
electricity a force caused by moving electrons (current) or by build-up of charges (static electricity).
atomic force the force that holds atoms (all matter) together, and also holds protons and neutrons and electrons together within atoms.
elasticity a force that pulls springy objects back to their original shape after you let them go.
balanced forces these are equal AND opposite (direction) forces, where there is no change in motion (no acceleration, speed stays same or no movement at all)
unbalanced forces forces are unequal, or the direction of the forces is not opposite. the motion will change (speed up or slow down or start moving or stop moving).
Created by: rhk9