Physics: Motion and Forces
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Questions and Answers

What is the fundamental idea behind Galileo's concept of projectile motion?

  • Combination of uniform motion in the horizontal direction and uniformly accelerated motion in the vertical direction (correct)
  • Uniform motion in both horizontal and vertical directions
  • Uniformly accelerated motion in both horizontal and vertical directions
  • Combination of uniformly accelerated motion in the horizontal direction and uniform motion in the vertical direction

    • What is the primary reason an object in motion will continue to move in the same direction and speed?

  • The absence of an unbalanced force (correct)
  • The force of gravity acting on the object
  • The force of air resistance acting on the object
  • The force of friction acting on the object

    • What is the relationship between the net force acting on an object and its acceleration, according to Newton's Second Law of Motion?

  • The acceleration of an object is directly proportional to the net force (correct)
  • The acceleration of an object is directly proportional to the square of the net force
  • The acceleration of an object is inversely proportional to the square of the net force
  • The acceleration of an object is inversely proportional to the net force

    • What is the principle behind Newton's Third Law of Motion?

    <p>The force of action is equal to the force of reaction</p> Signup and view all the answers

    What is the term for the tendency of an object to resist changes in its motion?

    <p>Inertia</p> Signup and view all the answers

    What was Galileo's prediction about balls rolling along a horizontal plane?

    <p>They would neither speed up nor slow down.</p> Signup and view all the answers

    According to Aristotle, what is the reason for an object coming to rest?

    <p>Lack of impetus.</p> Signup and view all the answers

    What is the acceleration of a projectile in Galileo's model?

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

    What is the main difference between Aristotle's and Galileo's understanding of motion?

    <p>Galileo believed in inertia, while Aristotle did not.</p> Signup and view all the answers

    According to Galileo, what is the effect of friction on an object's motion?

    <p>It decreases the object's speed.</p> Signup and view all the answers

    What is the main characteristic of an object's natural motion, according to Aristotle?

    <p>It is dependent on the object's composition.</p> Signup and view all the answers

    What is the fundamental concept of Galileo's investigation on motion?

    <p>Physics should be investigated by experiment rather than logic.</p> Signup and view all the answers

    What is the acceleration of pure freefall according to Galileo's experiments?

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

    What is the natural state of motion according to Galileo's concept?

    <p>Motion</p> Signup and view all the answers

    According to Galileo's concept, what is necessary for an object to start or stop moving?

    <p>Gravity and friction</p> Signup and view all the answers

    What is the main difference between Aristotle's and Galileo's ideas on motion?

    <p>Aristotle believed that motion depends on the object's composition, while Galileo did not.</p> Signup and view all the answers

    What is the implication of Galileo's concept that an object will keep moving in a straight line forever if there is no interference?

    <p>Objects will always maintain their initial velocity.</p> Signup and view all the answers

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