Consider a small frictionless puck perched at the top of a fixed sphere of radius r. if the puck is given a tinny nudge so that it begins to slide down. we assume the sphere is glued to a horizontal table at a point called p. when the puck strikes the table, how far is it from p?

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Answer(a)   the matererials that are in contact, the two materials and the nature of their surfaces/// (b)/// the force pushing the two surfaces together, pushing the surfaces together causes the more of the asperities to come together and increases the surface area in contact with each other