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Questions and Answers

What did Galileo Galilei discover about the movement of objects down inclined planes?

  • The velocity of the ball changed because the speed of the ball was changing (correct)
  • The objects moved at a constant velocity regardless of the incline angle
  • The acceleration of the objects remained constant throughout the motion
  • The mass of the object affected its velocity on the incline

    • What is the concept of inertia?

  • The ability of an object to maintain a constant speed
  • The force exerted by an object in motion
  • An object's tendency to resist change in its state of motion (correct)
  • The measure of an object's velocity

    • What did Galileo's experiments with inclined planes demonstrate?

  • The relationship between mass and velocity
  • The rate of change of velocity, known as acceleration (correct)
  • The impact of friction on velocity
  • The constant speed of objects on inclines

    • How did Galileo support his scientific conclusions?

    <p>By diligent use of experiments (B)</p> Signup and view all the answers

    What describes acceleration?

    <p>The change in velocity over time (D)</p> Signup and view all the answers

    What was one of the reasons for Galileo's success as a scientist?

    <p>His diligent use of experiments (A)</p> Signup and view all the answers

    What is the difference between speed and velocity?

    <p>Velocity includes direction, while speed does not (C)</p> Signup and view all the answers

    What is the formula for acceleration?

    <p>a = ΔV/Δt (A)</p> Signup and view all the answers

    If a car steadily increases its velocity from 20 km/h to 60 km/h in 3 seconds, what is its acceleration?

    <p>13.3 km/h*s (A)</p> Signup and view all the answers

    What is the acceleration of an object in free fall when air resistance is negligible?

    <p>9.8 m/s2 (D)</p> Signup and view all the answers

    When a car decelerates, it means that the car's:

    <p>Velocity decreases (B)</p> Signup and view all the answers

    What is the change in velocity for an object that goes from 10 m/s to 30 m/s in 5 seconds?

    <p>20 m/s (A)</p> Signup and view all the answers

    If an object's velocity changes by 5 m/s in 2 seconds, what is its acceleration?

    <p>2.5 m/s2 (D)</p> Signup and view all the answers

    What is the acceleration of an object that steadily increases its velocity from 12 km/h to 36 km/h in 4 seconds?

    <p>9 km/h*s (A)</p> Signup and view all the answers

    If an object's velocity changes by 15 m/s in 5 seconds, what is its acceleration?

    <p>3 m/s2 (B)</p> Signup and view all the answers

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