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Dynamics Short and Detailed Question Answers Physics 9th
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Dynamics Short and Detailed Question Answers Physics 9th

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Questions and Answers

In physics, what is the study of the motion of objects called?

  • Quantum mechanics
  • Electromagnetism
  • Thermodynamics
  • Dynamics (correct)
  • Which of the following is a unit of force?

  • Joule
  • Volt
  • Newton (correct)
  • Watt
  • What is the SI unit of momentum?

  • Kilogram
  • Newton-second (correct)
  • Joule
  • Meter per second
  • What is the SI unit of force?

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

    Which of the following is a derived unit?

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

    What is the formula for calculating kinetic energy?

    <p>$KE = \frac{1}{2} mv^2$</p> Signup and view all the answers

    Which of the following is a vector quantity?

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

    What is the SI unit of work and energy?

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

    Which of the following statements best describes Newton's third law of motion?

    <p>For every action, there is an equal and opposite reaction.</p> Signup and view all the answers

    Study Notes

    Core Physics Concepts

    • The study of the motion of objects is known as kinematics.
    • A unit of force is the Newton (N).
    • The SI unit of momentum is the kilogram meter per second (kg·m/s).
    • The SI unit of force is also the Newton (N).
    • A derived unit is created by combining fundamental units; for example, velocity (m/s) is derived from distance and time.
    • The formula for calculating kinetic energy is given by KE = 0.5 * m * v², where m is mass and v is velocity.
    • A vector quantity has both magnitude and direction; examples include velocity and force.
    • The SI unit of work and energy is the Joule (J).
    • Newton's third law of motion states that for every action, there is an equal and opposite reaction, emphasizing the interaction between forces.

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    Description

    Test your knowledge of dynamics with short and detailed question answers in this physics 9th grade quiz. Challenge yourself with questions about motion, forces, and Newton's laws.

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