Force Part 2
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Questions and Answers

What is the primary difference between a push and a pull in the context of force?

  • A push is applied vertically, while a pull is applied horizontally.
  • A push is a force exerted away from the object, while a pull is exerted towards it. (correct)
  • A push involves contact force, while a pull can be a non-contact force.
  • A push moves objects closer, while a pull moves them away.

    • Which of the following examples demonstrates force being applied as a push?

  • A caretaker pushing a baby stroller. (correct)
  • A bellboy pulling a luggage trolley.
  • A gardener pulling a grass roller on the lawn.
  • A bull pulling a cart.

    • In which scenario is force applied as a pull?

  • A child pushing a toy car.
  • A door being opened by pulling the handle. (correct)
  • A person leaning against a wall.
  • A car being pushed when it doesn't start.

    • What defines the concept of force?

    <p>A push or pull that causes movement.</p> Signup and view all the answers

    Which statement about force is NOT true?

    <p>Force always results in visible movement.</p> Signup and view all the answers

    What is the direction of the frictional force when an object is moved on a surface?

    <p>In a direction opposite to the object's motion</p> Signup and view all the answers

    Which term is used to describe the force by which Earth attracts a body towards its center?

    <p>Force due to gravity</p> Signup and view all the answers

    How is weight expressed in terms of units?

    <p>Kgf or gf</p> Signup and view all the answers

    What characterizes non-contact forces?

    <p>They act at a distance without physical contact</p> Signup and view all the answers

    What happens when like charges are brought close to each other?

    <p>They repel each other</p> Signup and view all the answers

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

    <p>The object speeds up.</p> Signup and view all the answers

    How does applying brakes to a vehicle affect its motion?

    <p>It slows down or stops the vehicle.</p> Signup and view all the answers

    What effect does squeezing a piece of rubber have?

    <p>It changes the shape or size of the rubber.</p> Signup and view all the answers

    What is the impact of a force applied from an angle to the direction of motion?

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

    Which of the following scenarios illustrates a force speeding up a moving body?

    <p>A cyclist pedaling faster on a flat road.</p> Signup and view all the answers

    What would happen if a force is exerted on a stationary object?

    <p>The object becomes deformed.</p> Signup and view all the answers

    When a football is kicked, what is primarily being applied?

    <p>A force that increases its speed.</p> Signup and view all the answers

    What can be inferred about the relationship between force and motion?

    <p>Any applied force can alter motion.</p> Signup and view all the answers

    What type of force acts on bodies without direct contact?

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

    What is the primary characteristic of contact forces?

    <p>They require physical interaction.</p> Signup and view all the answers

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

    <p>Gravitational attraction between two bodies</p> Signup and view all the answers

    What defines a force according to the content?

    <p>A force changes the state or shape of a body.</p> Signup and view all the answers

    What happens to two equal and opposite forces acting on a body?

    <p>They result in zero net force.</p> Signup and view all the answers

    Which statement about force is NOT true?

    <p>A force changes the mass of a body.</p> Signup and view all the answers

    What is the SI unit of force?

    <p>Newton (N)</p> Signup and view all the answers

    Which scenario illustrates the principle of a spring balance?

    <p>A spring stretching under the weight of an object</p> Signup and view all the answers

    How does a push typically affect a body compared to a stretch?

    <p>A push causes movement, while a stretch alters shape.</p> Signup and view all the answers

    Which of the following is an example of using force as a push?

    <p>Opening a window by pushing it.</p> Signup and view all the answers

    What effect does pushing a bulldozer have on rubble?

    <p>It moves the rubble from one place to another.</p> Signup and view all the answers

    In which scenario is force applied as a push?

    <p>Using a broom to move debris.</p> Signup and view all the answers

    What is a common everyday example of force as a push?

    <p>Closing a laptop by pushing it down.</p> Signup and view all the answers

    What is the effect of a force applied to a body initially at rest?

    <p>It can move the body.</p> Signup and view all the answers

    Which scenario demonstrates a force applied to stop a moving body?

    <p>A cyclist applying brakes to slow down.</p> Signup and view all the answers

    Which of the following actions would likely lead to a change in the shape of an object due to applied force?

    <p>Squeezing a toothpaste tube.</p> Signup and view all the answers

    If a moving baseball is caught by a fielder, what kind of force is being applied?

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

    What happens to a body at rest when an unbalanced force is applied?

    <p>It can move.</p> Signup and view all the answers

    What effect does a force have when applied in the opposite direction of a moving object?

    <p>Brings the object to a stop.</p> Signup and view all the answers

    When a force stretches a rubber band, which change is observed?

    <p>The length of the rubber band increases.</p> Signup and view all the answers

    In which scenario would a balanced force be present?

    <p>A book resting on a table.</p> Signup and view all the answers

    Study Notes

    Effects of Force

    • A force can change the motion of a body by altering its direction, speed, or state (rest or motion).
    • Changing Direction: Striking a falling cardboard changes its path due to the applied force.
    • Increasing Speed: A cyclist applies more force on the pedal to accelerate the bicycle.
    • Slowing Down: Brakes on a vehicle apply force opposite to motion, reducing speed.
    • Changing Shape/Size: Applying force to a non-moving body can deform it, like squeezing rubber.

    Types of Force

    • Forces can be classified as Contact Forces or Non-contact Forces.
      • Contact Forces: Act upon objects that are in direct contact (e.g., friction, muscular force).
      • Non-contact Forces: Act at a distance without direct contact (e.g., gravitational force, electrostatic force).

    Nature and Components of Force

    • Force is essentially a push or pull that causes movement or change in the state of an object.
    • Force as Push: Moving objects like a trolley or car require a pushing force.
    • Force as Pull: Moving objects like a grass roller is accomplished by pulling.

    Force of Gravity

    • The weight of a body is the gravitational force exerted by Earth, pulling it downward.
    • This force defines why objects fall vertically (e.g., leaves dropping from a tree).

    Frictional Force

    • Friction is a contact force acting against the direction of motion, opposing movement.

    Measurement of Force

    • The SI unit of force is the newton (N). Other units include kilograms-force (kgf) and gram-force (gf).
    • Force is calculated as the combination of magnitude and direction.

    Balanced and Unbalanced Forces

    • Forces that do not change a body's state (rest to motion, or vice versa) are balanced forces.
    • Forces that can alter a body’s state are referred to as unbalanced forces.

    Effects of Applying Force

    • Moving a Resting Object: A force can initiate motion in objects that are at rest (e.g., a car when pushed).
    • Stopping a Moving Object: Applying opposing force stops moving objects (e.g., brakes on a train).
    • Stretching and Squeezing: Forces can modify an object's shape or size (e.g., stretching a spring or squeezing a balloon).

    Everyday Examples of Force

    • Opening a door or moving heavy objects (push).
    • Pulling a door open or a cart (pull).
    • Stretching rubber or wires applies to the concept of stretching forces.
    • Squeezing a toothpaste tube or an inflated balloon leads to changes in shape/size.

    Summary of Key Principles

    • Force is a fundamental cause of motion and change.
    • Effects of force encompass moving, stopping, accelerating, and deforming objects.
    • Understanding force involves recognizing the distinction between contact and non-contact forces.

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    Description

    This quiz covers the various effects of force on motion, including changes in direction, speed, and shape. It also explores the classification of forces into contact and non-contact types. Test your understanding of the fundamental concepts of force and its applications.

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