The displacements are perpendicular. (R=sqrt{6^2+8^2}=10) m.
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27. A vector of magnitude 40 N makes an angle of 53° with the x-axis. If sin 53° = 0.8 and cos 53° = 0.6 its components are
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29. A boat travels 4 km east and then 3 km west. Its resultant displacement is