Force, A push or pull that changes motion or behavior, Contact forces, Forces that need touching, Non-contact forces, Forces that act from a distance, Friction force, Happens when two surfaces rub together, Normal force, Support force from a surface, Spring force, Force from a stretched or compressed spring, Magnetic force, Attraction or repulsion between magnets or magnetic materials, Gravitational force, Pulls objects toward Earth and attracts masses, Electrostatic force, Attraction or repulsion between electric charges, At rest, Staying still, Moving objects, Keep the same speed and direction without force.

Topic 2: Forces

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