Galileo's Contributions to Physics
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Questions and Answers

What is the main concept that Galileo discovered?

  • Gravity
  • Inertia (correct)
  • Acceleration
  • Velocity

    • What was unique about Galileo's approach to science?

  • He based his conclusions on mathematical models
  • He relied solely on logic and reasoning
  • He only studied the motion of living organisms
  • He used experiments to test hypotheses and ideas (correct)

    • What did Galileo observe when rolling a ball down an inclined plane?

  • The ball rolled faster and faster as it went (correct)
  • The ball rolled slower and slower as it went
  • The ball rolled in a circular motion
  • The ball rolled at a constant speed

    • What is the rate of change of velocity called?

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

    What can acceleration describe?

    <p>Both an increase and a decrease in an object's speed</p> Signup and view all the answers

    How did Galileo find the velocity of the ball changed as it rolled down the inclined plane?

    <p>It increased by the same amount each second</p> Signup and view all the answers

    What is the relationship between speed and velocity?

    <p>Speed is the distance traveled over time, while velocity is the speed and direction</p> Signup and view all the answers

    What is acceleration?

    <p>A change in speed, direction, or both</p> Signup and view all the answers

    What does zero acceleration mean?

    <p>The object is moving at a constant velocity</p> Signup and view all the answers

    What is the formula to calculate acceleration?

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

    What is the acceleration of an object in free fall?

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

    What is deceleration?

    <p>A decrease in an object's velocity</p> Signup and view all the answers

    What happens to an object's velocity when it turns?

    <p>It changes direction</p> Signup and view all the answers

    What is the rate of change in velocity for an object in free fall?

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

    What is the deceleration of an object thrown upward?

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

    What is the result of an object maintaining its velocity?

    <p>It has zero acceleration</p> Signup and view all the answers

    What is the unit of acceleration in the equation a = ΔV/Δt?

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

    What happens to an object's velocity when it turns?

    <p>It changes direction</p> Signup and view all the answers

    What is the acceleration of an object rolling down a frictionless inclined plane?

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

    What is the acceleration of an object thrown upward?

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

    What is the difference between speed and velocity?

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

    What does the formula a = ΔV/Δt represent?

    <p>Acceleration equals change in velocity over time</p> Signup and view all the answers

    What happens to an object's velocity when it is decelerating?

    <p>It decreases</p> Signup and view all the answers

    What is the primary reason Galileo's experiments were successful?

    <p>He was meticulous and thorough in his experimentation.</p> Signup and view all the answers

    What is the significance of the ball's velocity increasing by the same amount in each second as it rolled down the inclined plane?

    <p>It reveals a constant acceleration of the ball.</p> Signup and view all the answers

    How does acceleration relate to speed and velocity?

    <p>Acceleration is the change in velocity over time.</p> Signup and view all the answers

    What is the difference between speed and velocity?

    <p>Speed is the distance an object travels, while velocity is the speed and direction of an object.</p> Signup and view all the answers

    What is the significance of Galileo's concept of inertia?

    <p>It is an object's tendency to resist changes in its state of motion.</p> Signup and view all the answers

    What is the result of an object's acceleration?

    <p>The object's velocity changes.</p> Signup and view all the answers

    What is the relationship between acceleration and time?

    <p>Acceleration is directly proportional to time.</p> Signup and view all the answers

    Study Notes

    Galileo Galilei and Acceleration

    • Galileo Galilei is a prominent figure in physics, known for his concept of inertia, which is an object's tendency to resist change in its state of motion.
    • He also described speed and velocity, which is the speed and direction of an object.

    Acceleration

    • Acceleration is the rate of change of velocity over time.
    • It can describe both an increase and a decrease in an object's speed.
    • Acceleration can be a change in speed, direction, or both.

    Calculating Acceleration

    • Acceleration is calculated using the equation: a = ΔV/Δt, where a is the acceleration, V is the velocity, and t is the time.
    • The units of time do not cancel because there is time in the velocity (distance over time) and in the time of the acceleration.

    Examples of Acceleration

    • A ball rolling down an inclined plane gains velocity at a constant rate, demonstrating acceleration.
    • A car accelerating from 0 to 60 km/h in a certain time period demonstrates acceleration.
    • Turning a car's steering wheel changes its direction, resulting in acceleration.

    Free Fall

    • Falling objects, such as those dropped from a height or thrown upward, experience acceleration due to gravity.
    • The rate of change in velocity for free-fall is 9.8 m/s2, which means that the object gains speed as it falls at the rate of 9.8 m/s each second.
    • The acceleration of an object is the same, regardless of its size or shape, as long as air resistance doesn't affect its motion.

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    Description

    Learn about Galileo Galilei's groundbreaking contributions to the world of physics, including his discovery of inertia and concepts of speed and velocity. Understand the importance of experimentation in his scientific method.

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