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Course: PHYS 1110, Fall 2008School: Colorado
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on Pretest Relative Motion. Status (grad, undergrad, faculty, staff, other?) I: Two cars move with constant velocity along a straight road. The diagram shows their locations at instants 1-4, separated by equal time intervals. Ignore the north-south separation. An observer in car A records the position of car B relative to car A at various instants. At the instants below, in the reference frame of car A car B is...
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on Pretest Relative Motion.
Status (grad, undergrad, faculty, staff, other?)
I: Two cars move with constant velocity along a straight road. The diagram shows their locations at instants 1-4, separated by equal time intervals. Ignore the north-south separation. An observer in car A records the position of car B relative to car A at various instants. At the instants below, in the reference frame of car A car B is : Q5. t1: (circle one) moving west, moving east, at rest t2: (circle one) moving west, moving east, at rest t3: (circle one) moving west, moving east, at rest Q8. Explain your answers to the above 3 questions
At the instants below, in the reference frame of car A, car B is: Q9 t1: (circle one) speeding up, slowing down, moving with constant speed t2: (circle one) speeding up, slowing down, moving with constant speed
t3: (circle one) speeding up, slowing down, constant speed
Q12. Explain your answers to the above questions.
Q13. set Which of vectors best represents the velocity of car B in the reference frame of car A at instants 1, 2, and 3?: _______________ Q14. Explain.
-----------------------------------------------------------------------II: Car P moves with constant speed vo to the east. Car Q moves to the east on the same road while slowing down at a constant rate. The speed of car Q is 0.8vo at t = 0 s, and 0.4vo at t = 4 s. For the entire interval from t = 0 s to t = 4 s, car Q is ahead of car P (i.e., car Q is to the east of car P). At the instants below, in the ...
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