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The Coefficient of Restitution (COR) is a dimensionless value that quantifies how much kinetic energy remains after a collision between two objects, indicating the elasticity of the collision. A COR of 1 signifies a perfectly elastic collision where no kinetic energy is lost, while a COR of 0 indicates a perfectly inelastic collision where the objects do not bounce apart and kinetic energy is maximally dissipated.
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Early numeracy is about learning the basics of numbers and counting, like knowing what 'one', 'two', and 'three' mean. It's important because it helps you understand math better when you grow up.
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