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7mg4453. A vehicle is moving on a road with an acceleration a 20 m/s?the block of mass (m) and the vehicle so that block is does not fall downward is (g 10 m/si?)as shown in figure. The frictional coeffica-20 m/s(2) 0.4(4) 0.7(3) 2. In the given arrangement all surfn

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