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### LA_pretest_7_REM

Course: PHYS 1110, Fall 2008
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Word Count: 327

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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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A square with edge length L is made larger and larger.(1-2)As the square grows, the ratio A: B: C: D: E: increases decreases remains constant depends I have no idea(length of perimeter)area.B: Decreases: The perimeter is 4*L. The area is L*
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Pre-class test:How many controls in a normal car are specifically designed to accelerate the vehicle? A: 1 B: 2 C: 3 D: More than 34-0a)A boat moves across a lake with position +y vector given by r = (10, 10 + 2*t), i.e. x(t) = 10, y(t) = 10 +
Pre-class test:How many controls in a normal car are specifically designed to accelerate the vehicle? A: 1 B: 2 C: 3 D: More than 3I'm thinking gas pedal, brake, and steering wheel (!)4-0a)A boat moves across a lake with position +y vector giv
3-1. Thesolid line has length A, and makes an angle q with the negative y -axis, as shown.yx A qWhat is the length of the dotted line? A: B: C: D: E: A cos q A sin q A tan q sin q /A cos q /Ar 3-2 What's the x-component of the vector A?+y
(Reading quiz) 3-0a) Which one of the following is not a vector? A: velocity B: displacement C: position D: speed E: (I think MORE than one of these is not a vector!)a) D: Speed is NOT a vector (it's the magnitude of the velocity vector). Position I
10-1A ball bounces off the floor as shown. The direction of the impulse on the ball, Dp, is . A: straight up B: straight down C: to the right D: to the left 10-2Suppose a ping-pong ball and a bowling ball are rolling toward you. Both have th
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CT17-1Which one of the following is most likely to be impossible? A: B: C: D: E: Transverse waves in a fluid Longitudinal waves in a fluid Transverse waves in a solid Longitudinal waves in a solid Waves in a vacuum (no medium)CT17-2Consider the
CT16-1Which of the following is necessary to make an object oscillate? i. a stable equilibrium ii. little or no friction iii. a disturbance A: B: C: D: E: i only ii only iii only i and iii All threeCT16-2A particle which can move along the x-ax
CT16-1Which of the following is necessary to make an object oscillate? i. a stable equilibrium ii. little or no friction iii. a disturbance A: B: C: D: E: i only ii only iii only i and iii All threeAnswer: All three are generally necessary. If yo
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