force - a push or a pull, friction - a force that occurs between the surfaces of two objects that are touching, gravity - a force that pulls objects towards Earth's surface, lubricant - a substance that reduces friction between objects in contact, magnet - a material that applies the force of magnetism, magnetic poles - the places on a magnet where the magnetic force is strongest, motion - the process of an object changing position, oppose - to work against, pull - the application of a force with the intent to move something toward the source of the force, push - the application of a force with the intent to move something away from the source of the force, repel - to push away from, attract - to pull something closer, unbalanced forces - a collection of forces acting on an object that result in a change in the object's motion, at rest - not moving, balanced forces - a collection of forces acting on an object that cancel each other out and produce no change in the object's motion,

Investigating Forces

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