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Which of the following statements regarding the workdone by a force is correct? A) Work done by spring force can never be positive. OB) Work

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Which of the following statements regarding the workdone by a force is correct? A) Work done by spring force can never be positive. OB) Work done by friction force could be positive under certain special circumstances. O C) Work done by frictional force can never be positive. OD) Work done by gravitational force can never be positive

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