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Unformatted text preview: _‘________._......._—.. PH 1110 C Term 2008 Exam 1 Name Section Number 1a. [15 pts] During orientation, 3 new student is given instructions for a treasure hunt: A: Walk 282 steps Southwest. B: Turn to 126.90 with respect to East and walk 500 steps.
C: Turn to 30° with resPeet to East and walk 400 steps. On the graph below, sketch vectors that represent steps A, B, and C, assuming the student started from the origin. Label them. Also label the axes (E, N, W, S) and scales (number of steps).
1U 1b. [15 pts] What is the vector D
repreSenting the direction that the student
must take to return to the starting point?
Sketch it on the graph, and express it in
both i, j notation and as a magnitude and
angle with respect to East, measured
counterclockwise. Place your latter two
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L 4:; 1 ' _ ' ‘ it: ~(519+'§r‘5):I54€1—‘f00js+e7&5 3@O ' 1c. [10 pts] Express the direction of Dras a unit vector.'PIaee your answer in this box: A .4 n (243 c: (3.53.? c I' 01‘1‘53J‘ I Points earned on this page: 140' I PH 1110 C Term 2008 Exam 1 Name Section Number 2. You make the following measurement of vx(t) of a can on a track during Lab 1: Vx(t [cm/s] 2a. [15 pts] What is ax(t)at1 s, 4 s, 6 s, 9 s, and 12 s? '. [10. pté] Assunﬁng that thé cart surfed at'position x0 = +1 OOCm, what is its. position at t = 13 s? may 2 Mo) 4 Ame—I8) '
' :00 4—514 7 H‘favn '_ ' _‘ 15omts carnationthis page: m PH 1110 C Term 2008 Exam 1 Name Section Number 3. [20 pts] You measure vx(t) of a cart on a track during Lab 2, but for some reason, the x(t) and 3,112) data are not recorded. Sketch x(t) and ax(t), given the vx(t) data below. Be sure to label and scale the
y—axes. You choose x(0).
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 Spring '08
 Keil

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