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- 2. Express the force as a Cartesian vector in terms of unit vectors ‘i’ ‘j’ and ‘k’. Round to three significant figures.8. Consider two blocks, A and B, where ma < mB. They are pulled by a horizontal force with the same magnitude F. If there is no friction between block b and the table, and there is enough friction between block A and B so that they move together as a unit, which free-body diagram best represents block A? A FPlease explain