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Which of the following statements is true? Friction works in the direction opposite of motion. Lubrication can be used to increase friction. Only large masses exert gravitational force. Air resistance is greatest for objects with small surface areas.

User Qevo
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A. Friction works in the direction opposite of motion.

I just did this lesson :)
User Anthony Nolan
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probably A :) hope this helps
User Dustin Spicuzza
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