Friction:a force that opposes the motion of an object in contact with the surface
drag force:a force that oppose the motion of and object through a liquid or gas.
gravity:a force of attraction that exist between all object with mas
net force:the combined effect of all the forces acting on an object
balanced force: forces that cancel each other out when acting together on a single object
unbalanced force: forces that do not cancel each other out when acting together on a single object
inertia:the tendency of an object to oppose a change in motion
momentum: the mass of an object multiplied by its velocity
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La plata del vestuario de la feria esta aparte de los veinte dolares
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