Applied Force and Physics Basics
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Questions and Answers

What is an applied force in physics?

  • A type of frictional force that opposes motion
  • A kind of pushing or pulling effect that is felt by an object (correct)
  • The force exerted by an object on itself
  • A push or pull effect felt by an object due to gravity

    • What is a characteristic of an applied force?

  • It is always attractive in nature
  • It can only change the shape of an object
  • It is a scalar quantity
  • It has a magnitude and direction, making it a vector quantity (correct)

    • What is an example of an applied force?

  • A car moving at a constant velocity
  • A magnet attracting a paper clip
  • A ball rolling on the ground
  • A man pushing a door open (correct)

    • What can an applied force change in an object?

    <p>Its state of rest or motion, direction, size, or shape</p> Signup and view all the answers

    What is necessary for an applied force to exist?

    <p>A minimum of two objects</p> Signup and view all the answers

    What is the force that arises when two surfaces rub over each other?

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

    What is the force that pulls objects towards the earth?

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

    What type of force acts on a string or rope when it is stretched by an object?

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

    What is the force that acts between two or more stationary electric charges?

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

    What is the force that causes the moon to revolve around the earth?

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

    What is the effect of an applied force on an object?

    <p>It can change the state of the object or its shape.</p> Signup and view all the answers

    What type of force is exerted when a baseball player hits the ball?

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

    What is the fundamental difference between contact and non-contact forces?

    <p>Contact forces require physical contact, while non-contact forces do not.</p> Signup and view all the answers

    What is a common property of all applied forces?

    <p>They are vectors and must be specified with their magnitude and direction.</p> Signup and view all the answers

    What happens when two equal forces act on an object in opposite directions?

    <p>The applied force on the object becomes zero.</p> Signup and view all the answers

    Study Notes

    What is Applied Force?

    • Applied force is a push or pull effect exerted by one object on another.
    • It is a result of the interaction between a minimum of two objects.
    • Applied force has a magnitude and direction, making it a vector quantity.

    Characteristics of Applied Force

    • Can change the state of rest or motion of an object.
    • Can change the direction of an object.
    • Can change the shape or size of an object.

    Examples of Applied Force

    • Catching a ball: applying force to change the state of motion of the ball from motion to rest.
    • Hitting a baseball: applying force to change the direction of motion of the ball.
    • Creating pottery: applying force to change the shape of the clay.
    • Magnet attracting coins: applying a non-contact force to attract metal coins.

    Types of Applied Forces

    Contact Forces

    • Forces that occur when objects are in physical contact with each other.
    • Examples: catching a ball, hitting a baseball, creating pottery.

    Non-Contact Forces

    • Forces that occur between objects that are not in physical contact with each other.
    • Examples: magnet attracting coins, gravitational force, electrostatic force, magnetic force.

    Properties of Applied Forces

    • They are vectors, specified with magnitude and direction.
    • They are additive in nature, with resultant force given by the vector sum of individual forces.
    • They can be zero when two equal forces act on an object in opposite directions.

    Contact vs Non-Contact Forces

    • Contact forces occur when objects are in physical contact with each other.
    • Non-contact forces occur between objects that are separated by some distance.

    Uses of Applied Force

    • Earth and Solar System: gravitational force between planets and the sun.
    • Life on Earth: gravitational force between the earth and objects on or near it.
    • Pushing a parcel: both contact and non-contact forces act on it.
    • Magnetic refrigerator doors: non-contact magnetic force between the magnetic strip and the refrigerator body.

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    Description

    Learn about the concept of applied force, its definition, and examples in everyday life. Understand how objects interact with each other and the forces that come into play.

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