Forces and Motion
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Questions and Answers

What is the definition of force?

  • A type of friction
  • A type of motion
  • An action that changes or maintains the motion of a body or object (correct)
  • A type of energy
  • Gravity is an example of a contact force.

    False

    What is the energy an object possesses due to its motion?

    Kinetic Energy

    A stretched rubber band is an example of ______________________ energy.

    <p>Elastic Potential</p> Signup and view all the answers

    What type of force is friction?

    <p>Contact force</p> Signup and view all the answers

    Match the following types of energy with their definitions:

    <p>Kinetic Energy = Energy of motion Potential Energy = Stored energy based on position or state</p> Signup and view all the answers

    A moving car on a road is an example of potential energy.

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

    A ball held high above the ground is an example of ______________________ energy.

    <p>Gravitational Potential</p> Signup and view all the answers

    What type of force is air resistance?

    <p>Non-contact force</p> Signup and view all the answers

    What is the difference between kinetic energy and potential energy?

    <p>Kinetic energy is the energy of motion, while potential energy is stored energy based on position or state.</p> Signup and view all the answers

    Study Notes

    Forces

    • A force is an action that changes or maintains the motion of a body or object, and can be defined as a push or a pull.
    • Forces can change an object's speed, direction, and shape.

    Types of Forces

    • Push and Pull Forces:
      • Push: Kicking a ball
      • Pull: Plucking a guitar string
    • Non-contact and Contact Forces:
      • Non-contact Force: A force applied to an object by another body that is not in direct contact with it (e.g. Gravity)
      • Contact Force: A force between two objects that can only exist if they make direct contact with each other (e.g. Friction)

    Examples of Forces

    • Gravity
    • Tension
    • Normal (Contact) Force
    • Kinetic Friction
    • Static Friction
    • Air Resistance (Drag)
    • Elastic (Spring) Force

    Energy

    • Kinetic Energy:
      • Definition: Energy an object possesses due to its motion
      • Examples: A moving car on a road, a running person, wind moving a turbine

    Types of Potential Energy

    • Gravitational Potential Energy:
      • Definition: Energy stored in an object due to its position or state
      • Examples: A ball held high above the ground, water stored in a dam
    • Elastic Potential Energy:
      • Examples: A stretched rubber band, a compressed spring
    • Chemical Potential Energy:
      • Examples: Energy stored in food, batteries storing energy

    Summary

    • Kinetic Energy: Energy of motion
    • Potential Energy: Stored energy based on position or state

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    Description

    Learn about the basics of forces, including definition, types, and examples. Explore how forces can change an object's speed, direction, and shape.

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