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Q. A 0.24 meter stick balances at its center. If a necklace is suspended from one end of the stick, the balance point moves 8.0 toward that end. Is the mass of the necklace more than, less than, or the same as that of the meter stick?

Q. A 12 N force with a fixed orientation does work on a particle as the particle moves through displacement d = (2i-4j+3k)m. What is the angle between the force and the displacement if the change in the particle's kinetic energy is (a) +30 J. (b) -30J

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