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11. A displacement vector, at an angle of 30° with y-axis has an x-component of 10 units. Then the magnitudeof the vector is-(A) 5.0(B) 10(C) 11.5D)20

Answer» <p> given the x component is 10 units</p><p>and the angle to y axis is = 30° so the angle to x axis will be = 90-30 = 60°</p><p>Let the magnitude be Mso, Mcos60° = 10 or , M/2 = 10 ......... (cos60° = 1/2)</p><p>so, M = 2*10 = 20 units </p>


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