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In which of these situations is work being done on an object? Choose all that apply. * (2 Points) D a person walking up a

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In which of these situations is work being done on an object? Choose all that apply. * (2 Points) D a person walking up a set of stairs D a person carrying a book bag on their back D a person just holding a compressed spring (not chang- ing its length) D a person lifting weights D a person pushing a car along a level road D a person pushing agains a wall

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