Natalya Sydney: the conservation of energy tells you that the total amount of energy does not change, but can be converted from one form of energy to others and to work done against frictional forcesthe law of conservation of momentum tells you that in the absence of external forces, the total amount of momentum in a system is always the samegravity depends on the masses of the two objects and the distance between thema fulcrum is a pivot point; if you balance something on a sharp edge, that balancing edge is called the fulcrum...Show more
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