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the velocity of the average person over the course of a day is zero,…

- - - - a scalar quantity only depends on an object's magnitude
        
        scalar quantity
        
        distance is a scalar quantity
        
        distance
        
        Newton’s Law of Universal Gravitation states that every object exerts a force of attraction on every other object and the magnitude of the force is proportional to the masses and inversely proportional to the squared distance
        
        newton's law of universal gravitation
        
        distance x applied force = work
        
        work
        
        a machine is a basic mechanical device that reduces applied force for an increased distance (visa versa)
        
        machine
        
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- - - - the momentum of the system remains constant before and after the collision, but kinetic energy is lost due to deformation and/or friction during a perfect inelastic collision
        
        perfect inelastic collision
        
        a perfect inelastic collision results in two object's of different masses having the same velocity after the collision
        
        collision
        
        the collisions between a body in motion and the particles of air in its way result in a resistive force known as air resistance
        
        air resistance
        
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      - the impulse-momentum theorem states that the net impulse applied to an object is equivalent to the change in the object's momentum
        
        impulse-momentum theorem