RI-1A car's hood has a surface area of 2 m2. What is the surface area in cm2? Pink: 200 cm2 Green: 2000 cm2Blue: 20000 cm2= 2104 cm2Yellow: 2105 cm2Purple: None of these.RI-2Consider the equation a x2 + b x = 0. Solve for x.Pink: x = -b/a Yellow: x = a/bGreen: x = ab Blue: x = -abPurple: None of these.RI-3 An object's acceleration vs. time is:Which graph best represents the object's velocity vs. time?t a t v t v t v t v Pink Yellow Blue Green Purple: None of these!RI-4 A student is asked the following question on an exam: A car is moving at 90mph and suddenly brakes with a constant accelerationa = –2g to a full stop. How many second does the car take to stop?Which equation can be used to answer the question:21o o2o2 2o oYellow : x x v t a tBlue : v v atGreen : v v 2a(x x ) RI-5 At t = 0, a projectile is fired straight upward from a cannon. It goes up and then comes down. Assume that there is no air resistance. Upward is chosen as the positive y-direction. Which ofthe following graphs most accurately shows velocity vs. time for the projectile during its flight? t v t v Pink Green t v Yellow t v Blue Purple: None of these.RI-6 Consider the vector AWhich equation is correct? Yellow A ABlue A AGreen A APink A Axxxx: cos: cos: sin: sinRI -7Suppose you know the velocity vector of a particle at a particular instant of time and it is parallel to the ground. What do you know about the acceleration a of the particle?v Pink: The velocity vector and the acceleration vector are always either in the same direction or in opposite directions.Yellow: The acceleration vector is straight down.Green: You know nothing at all about the acceleration vector.Blue: The acceleration must be zero.A x yRI-8Consider the vectors V1 and V2 shown. Which is the vector is V = V2 - V1 ?V1 V? V2 Pink Yellow Green Blue RI-9.An elevator is going up at a constant speed. Near the top floor, itstarts to slow to a stop. During the period that it is slowing down,its acceleration isBLUE: downwardYELLOW: upward. PINK: in some other direction.RI-10The "multiflash photograph" below shows a ball rolling along asurface. The camera flashed once a second, and the time isshown above each image.Which graph below best represents the ball's velocity as afunction of time?RI-11What is the direction of vector C A B ?Ax = 1, Ay = 1Bx = -2, By = 2 xyBlue PinkGreen YellowPurple if along x or y axes.RI-12.A particle is moving with constant acceleration. Its velocity vectorat two different times is shown below. What is the direction of the acceleration?xyV1V2BlueYellowGreenPinkPurple: None of these!V1V2gAustralia!RI-13. Consider the vectors A and B as shown. A has magnitude 2 and B has magnitude 1. What is the direction of the vector (A – 3 B)?A B Pink: Right Yellow: Left Green: No direction because the vector is zero.RI-14. The vector A has length 5. The vector B has magnitude 4. You have no other information about the two vectors. Consider the following statements about the vector A+B.A) The magnitude of the vector A+B can be between 5 and 9.B) The magnitude of the vector A+B can be between 0 and 4.C) The magnitude of the vector A+B can be between -1 and 9.D) The magnitude of the vector A+B can be between 1 and 9.Which statements, if any, are true?Pink: A only Yellow: A and C onlyPink: D only Purple: None of
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