Physics Chapter: Understanding Forces
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Questions and Answers

What is the definition of force?

  • A physical cause that changes the state of rest or motion of an object (correct)
  • The distance an object moves
  • A change in temperature
  • The weight of an object
  • A force can only be applied by a person.

    False

    Name one everyday example of a force.

    Opening a door

    A force applied to an object can result in a change in _______.

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

    Match the following actions with their types of force:

    <p>Opening a door = Push Pulling a rope = Pull Kicking a ball = Push Stretching a rubber band = Pull</p> Signup and view all the answers

    Which of the following is an example of a non-contact force?

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

    Friction always speeds up the motion of objects.

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

    What force is responsible for a plastic comb attracting small bits of paper?

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

    What type of force always opposes the motion of one body over another?

    <p>Frictional Force</p> Signup and view all the answers

    In non-contact forces, _______ is an example that involves pulling iron objects.

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

    Match the types of forces with their descriptions:

    <p>Muscular Force = Force generated by muscles used by animals Contact Forces = Forces applied when objects touch Electrostatic Force = Force exerted without contact through electric charges Friction = Force that opposes motion between surfaces in contact</p> Signup and view all the answers

    A non-contact force requires objects to be in direct contact with each other.

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

    What happens to a moving object when a force is applied in the opposite direction of its motion?

    <p>The object slows down.</p> Signup and view all the answers

    A force applied on an object by another object that is in direct contact with it is called a __________.

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

    Match the following types of forces with their examples:

    <p>Frictional Force = Stopping a moving boat Muscular Force = Lifting an object Electrostatic Force = Attraction of paper by a rubbed pen Gravitational Force = Falling of an apple from a tree</p> Signup and view all the answers

    What happens when two forces act in the same direction on an object?

    <p>The resultant force is equal to the sum of the forces.</p> Signup and view all the answers

    When two equal forces act in opposite directions, the resultant force is equal to the sum of the forces.

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

    What is the SI unit of force?

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

    A push or a pull is considered a _____ force.

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

    Match the following forces with their effects:

    <p>Push = Makes a stationary object move Pull = Changes the shape of an object Resultant Force = Net effect of all forces acting on an object Magnitude = Strength of a force</p> Signup and view all the answers

    Electrostatic force is a contact force.

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

    What happens to the nails when a container is placed on the wooden board?

    <p>The nails sink into the wooden board.</p> Signup and view all the answers

    The force acting normally per unit area of a surface is called ____.

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

    Match the following forces with their descriptions:

    <p>Electrostatic Force = Non-contact force due to charged objects Gravitational Force = Attraction between masses Frictional Force = Resists relative motion between surfaces Thrust = Force acting normally on a surface</p> Signup and view all the answers

    Which of the following factors does pressure depend on?

    <p>Area over which the force acts</p> Signup and view all the answers

    When lifting a bucket, we do not apply any force against gravity.

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

    ____ Pascal is known for his work on fluids and pressure.

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

    What happens to an object at rest when a force is applied to it?

    <p>It moves in the same direction of the applied force.</p> Signup and view all the answers

    Squeezing a toothpaste tube involves pushing the tube to get the paste out.

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

    What is the measure of force's strength called?

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

    A body is _____ when a force applied to it increases its length in the direction of the applied force.

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

    Match the following actions with their descriptions:

    <p>Pulling = Moving an object towards oneself Pushing = Moving an object away from oneself Squeezing = Changing the shape of an object Lifting = Raising an object upward</p> Signup and view all the answers

    Which of the following describes a force due to interaction?

    <p>Forces can only be applied when two objects interact.</p> Signup and view all the answers

    The size and shape of an object are irrelevant to its description.

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

    What is an example of a situation where a force is applied to move an object?

    <p>A boy pushing a door.</p> Signup and view all the answers

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