Force and Pressure MCQ Quiz for CBSE Class 8 Science
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Questions and Answers

What is force?

In science, force is defined as a push or pull of an object.

What are the two components of force?

Force has both magnitude and direction.

How does force bring about a change in a body?

Force brings about a change in the direction or state of motion of a body.

What is a push?

<p>A push is a force exerted away from the body.</p> Signup and view all the answers

What is magnetic force?

<p>Magnetic force is the force of attraction or repulsion between two magnetic bodies.</p> Signup and view all the answers

When an object slips off your hand, it always falls down. What pulls it down?

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

If you roll a ball on a level ground, it slows down and after sometime it will come to a stop. What makes the ball stop?

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

What forces acting on objects, change their state or state of motion?

<p>Forces acting on objects can change their state or state of motion.</p> Signup and view all the answers

Why does the toothpaste come out when we press the tube?

<p>When we press the tube, it exerts a contact force on the toothpaste, squeezing it out.</p> Signup and view all the answers

Why does the needle of a magnetic compass move when we place a bar magnet near it?

<p>The needle of a magnetic compass moves because of the magnetic force exerted by the bar magnet.</p> Signup and view all the answers

Study Notes

Forces and Motions

  • A force is a push or a pull that causes an object to change its state of motion or shape.
  • A force has two components: magnitude (amount of force) and direction.

Types of Forces

  • Magnetic force is a type of force that arises from the interaction of magnets or magnetic fields.

Gravity

  • Gravity is a force that pulls objects towards each other, and on Earth, it pulls objects towards the ground.
  • When an object slips off your hand, gravity pulls it down towards the ground.

Friction

  • Friction is a force that opposes motion between two surfaces in contact.
  • When a ball rolls on a level ground, friction slows it down and eventually brings it to a stop.

External Forces

  • External forces acting on objects can change their state or state of motion.
  • Examples of external forces include pushes, pulls, and magnetic forces.

Everyday Applications

  • When we press a toothpaste tube, the force applied makes the toothpaste come out.
  • When we place a bar magnet near a magnetic compass, the magnetic force makes the needle move.

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Description

Test your knowledge on force and pressure with this MCQ quiz! Covering topics such as the definition of force, its interaction with objects, and more, this quiz is a great way to review and reinforce your understanding of Chapter 11 (renumbered as Chapter 8) in the CBSE Class 8 Science syllabus.

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