Physics Chapter on Motion and Velocity
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Questions and Answers

What is the velocity of the ball just before it hits the ground after being dropped from a height of 1.5 m?

  • 0 m/s
  • 3.87 m/s (correct)
  • 4.90 m/s
  • 6.26 m/s
  • What would the value of the initial velocity ($v_i$) be for the first drop if the ball was dropped from a height of 1.5 m?

  • 0 m/s (correct)
  • 4.5 m/s
  • 3.0 m/s
  • 2.2 m/s
  • What is the total time of flight for the ball after it is dropped and before its first bounce?

  • 0.50 s
  • 0.23 s
  • 0.12 s
  • 0.46 s (correct)
  • How high does the ball bounce after the first fall?

    <p>0.75 m</p> Signup and view all the answers

    What does the position-time graph of the ball look like after the first two bounces?

    <p>An inverted parabolic shape descending and ascending</p> Signup and view all the answers

    How far did the hockey puck move between 0.0 s and 5.0 s?

    <p>100 m</p> Signup and view all the answers

    What is the time taken for the puck to move from 40 m to 80 m beyond the origin?

    <p>2.0 s</p> Signup and view all the answers

    If two students compared their position vectors at t = 2 s and found them pointing in different directions, what is a likely reason?

    <p>They used different origin points.</p> Signup and view all the answers

    At what moment does the hockey puck first pass 10.0 m beyond the origin?

    <p>0.5 s</p> Signup and view all the answers

    Which graph information is primarily used to calculate instantaneous acceleration?

    <p>Velocity-time graph</p> Signup and view all the answers

    For a uniform motion of an object, which statement is true?

    <p>The object covers equal distances in equal intervals of time.</p> Signup and view all the answers

    What characterizes a displacement vector compared to a position vector?

    <p>Displacement depends on the choice of origin.</p> Signup and view all the answers

    When is the toy train's speed considered constant according to the v-t graph?

    <p>When the graph is horizontal.</p> Signup and view all the answers

    What is the final position of the first ship?

    <p>52 km west</p> Signup and view all the answers

    Which statement correctly describes the relationship between an object's velocity and its position?

    <p>Velocity is the rate of change in its position.</p> Signup and view all the answers

    What is the average velocity of object A based on the given data?

    <p>-2 m/s</p> Signup and view all the answers

    How do the average velocities of objects C and D compare?

    <p>Both have equal magnitudes but different signs.</p> Signup and view all the answers

    What is the correct ranking of the average speeds from greatest to least?

    <p>A, B, C, D</p> Signup and view all the answers

    What is the final position of the second ship?

    <p>40 km west</p> Signup and view all the answers

    What can be inferred about the average velocity of object B?

    <p>It is greater than that of object C.</p> Signup and view all the answers

    Which of the following correctly states the average velocity of object D?

    <p>1 m/s</p> Signup and view all the answers

    How long does it take for the race car to slow down from 44 m/s to 22 m/s?

    <p>11 seconds</p> Signup and view all the answers

    What is the average acceleration of the race car during its deceleration?

    <p>-2 m/s²</p> Signup and view all the answers

    What distance did the race car travel while decelerating?

    <p>360 m</p> Signup and view all the answers

    What is the time taken for the car to accelerate from 15 m/s to 25 m/s over a distance of 125 m?

    <p>6.25 seconds</p> Signup and view all the answers

    What was the initial velocity of the bike if it reaches a velocity of 7.5 m/s in 4.5 seconds?

    <p>0.94 m/s north</p> Signup and view all the answers

    How far does the bike travel when reaching a velocity of 7.5 m/s at 4.5 seconds?

    <p>19 m north</p> Signup and view all the answers

    What was the average acceleration of the bike during its acceleration phase?

    <p>1.66 m/s²</p> Signup and view all the answers

    What was the car's velocity (𝑣i) at point 𝑥i if it travels 350 m in 18.4 seconds with a forward acceleration of 0.22 m/s²?

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

    What is the average velocity of the car from its starting position of 125.0 m to the origin in 5.0 s?

    <p>−25 m/s</p> Signup and view all the answers

    At what time does the car reach a position of 25.0 m east of the origin?

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

    What distance did the car cover between t = 1.0 s and t = 3.0 s?

    <p>50 m west</p> Signup and view all the answers

    If the positive x-direction is east, what would be the position of the car at t = 1.0 s?

    <p>100.0 m east of the origin</p> Signup and view all the answers

    What can be inferred if the pedestrians in Figure 14 move with the same velocity?

    <p>They are moving in the same direction.</p> Signup and view all the answers

    What does the negative sign represent in the car's average velocity of −25 m/s?

    <p>The car is moving west.</p> Signup and view all the answers

    How is displacement calculated between two time points?

    <p>By using the formula ∆𝑥 = 𝑥f − 𝑥i.</p> Signup and view all the answers

    What is the position of the car at time t = 3.0 s?

    <p>−25.0 m east of the origin</p> Signup and view all the answers

    What is the formula to calculate the final velocity ($v_f$) for an object in free fall over time ($ riangle t$)?

    <p>$v_f = v_i - g riangle t$</p> Signup and view all the answers

    If an object is dropped from rest, what would its maximum time of flight ($t_{max}$) be before reaching the ground?

    <p>$t_{max} = rac{v_i}{g}$</p> Signup and view all the answers

    In the equation $y = y_0 + v_i t - rac{g t^2}{2}$, what does the term $y_0$ represent?

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

    How is the initial velocity ($v_i$) calculated when given a maximum height of 0.75 meters?

    <p>$v_i = ext{sqrt}(0.75 imes 2g)$</p> Signup and view all the answers

    What will be the value of the term $y$ when an object is dropped and not yet reached the ground, given $g = 9.8 ext{m/s}^2$ and initial height of 1.5 meters?

    <p>$y = 1.5 - 4.9t^2$</p> Signup and view all the answers

    Upon landing after the second bounce, how is the final velocity ($v_f$) represented?

    <p>$v_f = ext{sqrt}(14.7) - 9.8t$</p> Signup and view all the answers

    If it takes 0.55 seconds for an object to fall, what formula would you use to calculate the distance fallen?

    <p>$d = rac{1}{2} g t^2$</p> Signup and view all the answers

    What describes the relationship between gravitational acceleration and time during free fall?

    <p>Velocity increases linearly with time</p> Signup and view all the answers

    Study Notes

    InspirePhysics Grade 9 - Advanced, AY: 2024-2025, Term 1

    • End of Term 1 Final Summative Assessment Preparation
    • Content Outline for Unit 1: Mechanics in One Dimension
      • Module 1: Physics Toolkit
        • Lesson 1: Methods of Science
        • Lesson 2: Mathematics and Physics
        • Lesson 3: Measurement
        • Lesson 4: Graphing Data
      • Module 2: Representing Motion
        • Lesson 1: Picturing Motion
        • Lesson 2: Where and When?
        • Lesson 3: Position-Time Graphs
        • Lesson 4: How Fast?
      • Module 3: Accelerated Motion
        • Lesson 1: Acceleration
        • Lesson 2: Motion with Constant Acceleration
        • Lesson 3: Free Fall
    • Key Equations for Use:
      • ∆x = xf - xi
      • vf = v₁ + ā∆t
      • x = vt + xi
      • v = v₀ + 2a(xf - xi)
      • g = 9.8 m/s²

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    Description

    This quiz explores key concepts in physics related to motion, including velocity, acceleration, and the characteristics of position-time graphs. You will be challenged with questions about the behavior of objects like balls and hockey pucks, as well as the principles of displacement and time of flight. Test your knowledge on these fundamental topics in mechanics!

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