When work is done by an applied force, the object's energy will change. in this interactive, does the work cause a kinetic energy change or a potential energy change?

c because the action was the roller coaster reaches bottom of hill (action) reaction would be blood tends to drain away from head

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their crystal patterns have been disrupted by stress

d. platinum would have the greatest temperature increase because it has the lowest specific heat.

there are no contact forces mentioned on the list of choices that you've provided.