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 Ain 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 Ax, y component of vector A as Ay, and its length as |A|. Then we have Ax2+Ay2=|A|2(|A|/2)2+Ay2=|A|2it then follows that Ay=32AAnswer D.