Given \(\overrightarrow{AB}=(4,-2)\) and \(\overrightarrow{AC}=(1,5)\), find \(\overrightarrow{BC}\).
Question 14
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Two tugs pull with forces \(8\) N east and \(6\) N north. Find resultant magnitude and direction north of east.
Question 15
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A particle moves from \(A=(1,-2,3)\) to \(B=(4,0,-1)\), then to \(C=(-2,5,2)\). Find the resultant displacement and the total path length travelled.
Question 16
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Three coplanar forces keep a joint in equilibrium. Two forces are \((3,-8)\) N and \((-1,5)\) N. Find the third force and its magnitude.
Question 17
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A drone starts at \((2,1,5)\), makes displacements \((-4,3,2)\) and \((1,-6,-7)\), then must end at \((0,0,4)\). Find the final correction displacement.
Question 18
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A robot starts at \((1,2)\), moves by \(2\mathbf i-\mathbf j\), then by \(-3\mathbf i+4\mathbf j\), then by \(\mathbf i-6\mathbf j\). Find its final position and the single displacement that would return it to the start.
Question 19
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Air velocity is \((90,0)\) km h\(^{-1}\) and wind velocity is \((-20,15)\) km h\(^{-1}\). Find ground velocity and speed.
Question 20
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Four displacement vectors form a closed path: \((2,5)\), \((-1,3)\), \((4,-6)\), and \(\mathbf d\). Find \(\mathbf d\).