Midterm1Solution

Midterm1Solution - PHYSICS 9A MIDTERM 1 October 27 2011 I...

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PHYSICS 9A MIDTERM 1 October 27 , 2011 I certify by my signature below that I will abide by the UC Davis Code of Academic Conduct. This includes not copying from anyone else’s exam not letting any other student copy from my exam not discussing this exam with any student who has not yet taken it, nor providing any information, written or oral, that might get to a student who has not yet taken it. Anyone suspected of cheating will be automatically reported to Student Judicial Affairs. LAST NAME: FIRST NAME: STUDENT ID: (P R I N T) (P R I N T) (LAST 4 DIGITS) Signature: Problem 1 (two points) . If the x component of a vector A in the x-y plane is half as large as the magnitude of the vector, its y component is Denote x component of vector A as A x , y component of vector A as A y , and its length as |A|. Then we have A x 2 +A y 2 =|A| 2 (|A|/2) 2 +A y 2 =|A| 2 it then follows that A y = 3 2 A Answer D.
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