Chapter 6 review

    Standardized test practice
    1. A projectile has an initial velocity of 17 m/s. The projectile has an x-component velocity of 15 m/s and a y-component velocity of 8.0 m/s. What is the range of the projectile?
      1. 1.6 m
      2. 13 m
      3. 24 m
      4. 28 m

    2. An object is placed on a frictionless inclined plane with a height of 3.0 m. It has an acceleration of 3.7 m/s2. What is the length of the inclined plane?
      1. 1.1 m
      2. 7.9 m
      3. 11 m
      4. 36 m

    3. In writing a report for Investigation 25C, which of the following statements is best for a student to use in order to maintain an objective tone and formal style?
      1. The ErgoBot sped up more and more when my buddy made the ramp steeper.
      2. Keeping the ramp low was a lousy idea.
      3. Height mattered a lot.
      4. The acceleration of the ErgoBot increased as the height it was released from increased.

    4. Which shape best describes the trajectory of a projectile?
      1. straight line
      2. semicircle
      3. triangle
      4. parabola

    5. Which is the best choice of materials or equipment for determining where an object strikes the ground?
      1. mud
      2. clear plastic transparency
      3. carbon paper on white paper
      4. photogate timer

    6. A marble is launched at a speed of 9 m/s at an angle of 25° above the horizontal. If the experiment is done on a level floor, then how far away will the marble land if friction is neglected?
      1. 1.58 m
      2. 3.16 m
      3. 6.33 m
      4. 6.98 m

    1. A projectile travels a horizontal distance of 25.0 m in 3.00 s. What was the magnitude of the total initial velocity?
      1. 6.37 m/s
      2. 8.33 m/s
      3. 14.7 m/s
      4. 16.9 m/s

    2. A projectile with a total velocity of 10 m/s is in the air for 0.5 s. What was its initial x-component velocity?
      1. 2.4 m/s
      2. 3.2 m/s
      3. 5.0 m/s
      4. 9.7 m/s

      3. Airplane with ailerons and rudder identified
    3. A flight instructor makes the following statement:
      “The aircraft’s velocity vector can change direction through the use of the controls that move the ailerons on the wings, the rudder on the tail, or both.”
      Which of the following best summarizes what the instructor is telling you?
      1. how to speed the plane up
      2. how to turn the plane
      3. how to slow the plane down
      4. how to increase the plane’s altitude

    4. “Two velocity vectors at right angles to each other cannot be added as if they were along the same line.”

      The term “at right angles” used above means that
      1. the angle is between 0° and 90°.
      2. the angle between the vectors is 90°.
      3. the vectors are given as speeds and angles.
      4. the angles are the correct kind of angles for velocity vectors.

    5. Which of the following is the best example of a graphing technology?
      1. photogate timer that displays the time an object crossed it
      2. digital odometer on a car
      3. seismograph for sensing earthquakes
      4. robotic pen for signing legal documents remotely

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