CUBoulder PHYS 1110  Questions (3 pages)
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 Phys 1110  General Physics 1
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CT3 1 The solid line has length A and makes an angle with the negative y axis What is the length of the dotted line y Pink A cos Yellow A sin Green A tan x A Blue sin A Purple cos A Answer A cos A A cos ur ur Consider the vector A What is the x component of A y x A Pink A cos Green A sin Yellow Something else don t know Answer Something else Ax A cos The x component of the vector A is NEGATIVE CT3 2 Can two vectors of unequal magnitude sum to zero Green Yes Pink No Answer No the only way two vectors can sum to zero is if they have the same magnitude and opposite directions Can three vectors of equal magnitude sum to zero Green Yes Pink No Yes if the three vectors have equal length and have directions such that they can form the sides of an equilateral triangle CT3 3 Vectors A B and C sum to zero Vectors A and B are at right angles to each other What is the magnitude of C C Pink A B Green Yellow A B A 2 B2 Blue Impossible to tell from the information given Answer Green by Pythagorean Theorem C A B CT3 4Three vectors A B and C are as shown Which vector is S A B C B A Pink C Blue Green Yellow Purple None of these Answer None of these The x component of vector S is Sx Ax Bx Cx 0 2 3 1 None of the first 4 answers has an x component of 1
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