Physics Chapter 16: Stunt Car Dynamics
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Questions and Answers

What is the time it takes for the stone kicked horizontally from a 50.0 m high building to hit the ground?

  • 3.19 s (correct)
  • 5.10 s
  • 12.5 s
  • 10.2 s

    • If a crate is dropped from a plane moving horizontally at 100 m/s, what is the horizontal component of its velocity just before impact with the ground?

  • 100 m/s (correct)
  • 0 m/s
  • 50 m/s
  • 294 m/s

    • Which launch angle yields the maximum horizontal distance when hitting a golf ball with an initial speed of 20 m/s?

  • 60°
  • 75°
  • 30°
  • 45° (correct)

    • In the context of the stone kicked horizontally, which variable would most directly change the time it takes to hit the ground if altered?

    <p>The height of the building</p> Signup and view all the answers

    Which of the following can be assumed about the horizontal motion of the crate dropped from the plane?

    <p>It maintains a constant speed</p> Signup and view all the answers

    What is the formula used to calculate the vertical component of the initial velocity (Viy) of the soccer ball?

    <p>Viy = Vi sin(θ)</p> Signup and view all the answers

    Which of the following correctly represents the final equation used to find the maximum height of the soccer ball from its initial position?

    <p>0 = Viy² + 2(-10 m/s²)(hmax)</p> Signup and view all the answers

    What does the trajectory of the soccer ball represent on the diagram?

    <p>A parabola representing projectile motion</p> Signup and view all the answers

    At each point of the ball's flight, what direction does the acceleration vector due to gravity point?

    <p>Straight down towards the ground</p> Signup and view all the answers

    What is the approximate horizontal distance covered by the soccer ball during its flight?

    <p>12.91 m</p> Signup and view all the answers

    What is the relation between the time taken for the red ball and the green ball to reach the ground?

    <p>Both balls take the same time.</p> Signup and view all the answers

    Assuming neglect of air resistance, what can be concluded about the horizontal motion of ball A after the lever is released?

    <p>Ball A moves with constant velocity.</p> Signup and view all the answers

    What is the approximate maximum height the basketball player reaches during her jump?

    <p>0.4 m</p> Signup and view all the answers

    If the motion of ball B is analyzed, at what point does it hit the ground compared to ball A?

    <p>Ball B and ball A hit the ground simultaneously.</p> Signup and view all the answers

    What does the negative value of displacement indicate in the jump calculation?

    <p>The direction of displacement is downward.</p> Signup and view all the answers

    What is the vertical velocity of the car at point A?

    <p>-5.5 m/s</p> Signup and view all the answers

    How far does the car drop vertically from point A to point B?

    <p>1.24 m</p> Signup and view all the answers

    What is the horizontal component of the velocity of the car at point B?

    <p>16 m/s</p> Signup and view all the answers

    Which of the following represents the correct formula to calculate vertical displacement given the initial velocity and acceleration?

    <p>dy = V_{yi} t + rac{1}{2} at^2</p> Signup and view all the answers

    What is the initial vertical velocity at point A given the provided conditions?

    <p>0 m/s</p> Signup and view all the answers

    What is the primary focus when constructing the stem of a question?

    <p>Creating a meaningful problem without irrelevant material</p> Signup and view all the answers

    Which of the following practices should be avoided when writing options for a multiple-choice question?

    <p>Including 'all of the above' as an option</p> Signup and view all the answers

    What is a key characteristic of the correct answer in a multiple-choice question?

    <p>It must be the only factually correct answer</p> Signup and view all the answers

    What type of language should be employed in the distractors of a multiple-choice option?

    <p>Familiar and accessible language to increase relatability</p> Signup and view all the answers

    Which of the following approaches to question writing is essential for maximum effectiveness?

    <p>Ensuring each question tests a different aspect of the content</p> Signup and view all the answers

    What initial vertical velocity does the ball have when it rolls off the platform?

    <p>0 m/s</p> Signup and view all the answers

    If the height difference between the platforms is increased to 5.0 m, how would the total time in the air change?

    <p>It would increase.</p> Signup and view all the answers

    Which equation is correctly used to determine the time the ball is in the air?

    <p>$d = v_it + rac{1}{2}(-10)t^2$</p> Signup and view all the answers

    What value does the acceleration due to gravity typically take when solving projectile motion problems?

    <p>-10 m/s²</p> Signup and view all the answers

    If the ball was thrown downward instead of rolling off horizontally, how would the initial vertical velocity affect the total time in the air?

    <p>It would not change the time but affect the final velocity.</p> Signup and view all the answers

    What is the horizontal component of the initial velocity of the ball during its launch?

    <p>2.5 m/s</p> Signup and view all the answers

    Which variable represents the final vertical velocity at the maximum height of the ball's trajectory?

    <p>V_{fy}</p> Signup and view all the answers

    What acceleration value is applied in the vertical component calculations?

    <p>-10 m/s²</p> Signup and view all the answers

    How long does it take for the ball to reach its maximum height after launch?

    <p>0.40 s</p> Signup and view all the answers

    What is the vertical component of the initial velocity of the ball?

    <p>4.0 m/s</p> Signup and view all the answers

    Which equation is used to find the initial vertical component of velocity $V_{iy}$?

    <p>$d = V_{iy} t + \frac{1}{2} a t^2$</p> Signup and view all the answers

    Which of the following is NOT true regarding the motion of the ball?

    <p>The ball's horizontal velocity decreases due to gravity.</p> Signup and view all the answers

    What is the significance of the value 0.78 meters in the context of this problem?

    <p>It represents the change in vertical position of the target.</p> Signup and view all the answers

    Study Notes

    Problem 16-18

    • A stunt car is driven horizontally off a cliff.
    • The path of the car is shown in a diagram.
    • The car leaves the cliff at point A.
    • The car travels to point B in 0.50 seconds.
    • The distance from point A to point B is 8.0 meters horizontally.
    • Acceleration due to gravity is -10 m/s².

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    Description

    This quiz explores the motion of a stunt car driven horizontally off a cliff. It covers the principles of horizontal motion and free fall, focusing on the car's trajectory from point A to point B over 0.50 seconds with a distance of 8.0 meters. Test your understanding of these concepts in the context of physics.

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