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5. A 1.8 kgblock is moved at constant speed over a surface for which coefficient of friction μ--ltis pulled by a force Facting at 45e with horizontal as shown in Fig. 9.9. The block is displaced by2 m. Find the work done on the block by (a) the force F (b) friction (c) gravity45°Fig. 9.9noton and x in

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