Questions
Question 1
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Compute \((2,3)+(4,-1)\).
Question 2
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A walker moves \(5\) m east then \(2\) m east. Find the resultant displacement.
Question 3
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Compute \(3\mathbf i-2\mathbf j+(-5\mathbf i+7\mathbf j)\).
Question 4
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A boat travels \(4\) km north then \(3\) km east. Write the resultant vector and magnitude.
Question 5
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Find \((1,-4,2)+(6,0,-5)\).
Question 6
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Find \(\overrightarrow{AC}\) if \(\overrightarrow{AB}=(3,4)\) and \(\overrightarrow{BC}=(3,-5)\).
Question 7
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Three forces are \((2,1)\) N, \((-5,3)\) N, and \((4,-6)\) N. Find the resultant.
Question 8
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A drone moves \((1,2,0)\) m, then \((0,-3,4)\) m. Find final displacement from the start.
Question 9
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Find \(\mathbf a+\mathbf b\) and its magnitude for \(\mathbf a=(6,2)\), \(\mathbf b=(-1,10)\).
Question 10
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Find \(\mathbf x\) if \(\mathbf x+(2,-7)=(5,1)\).
Question 11
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A hiker walks \(6\) km east, \(2\) km south, then \(1\) km west. Find resultant vector and magnitude.
Question 12
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Compute \(\mathbf p+\mathbf q+\mathbf r\) for \(\mathbf p=(2,-1,3)\), \(\mathbf q=(-4,5,0)\), \(\mathbf r=(1,1,-6)\).
Question 13
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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 \(\mathbf d\).