Force: Push and Pull in Everyday Life for Class 8

Force is an important concept in physics that helps us understand how objects move, stop, or change shape. Every action we perform, like pushing a door or pulling a bag, involves force. In science, force is considered an interaction that can change the state of motion or rest of an object and has both magnitude and direction. In this article, we will understand force, its effects, magnitude, and different types in a simple way.

Table of Contents

• Introduction to Force
• Effects of Force on Objects
• Understanding the Magnitude of Force

Introduction to Force

Force is something we use in almost every activity, whether it is pushing, pulling, lifting, or throwing objects. We use force to perform various day-to-day activities.

Simply,

“A push or pull acting on an object is known as force.”

The S.I. unit of force is newton (N), and the CGS unit is dyne. ( 1 N = 105 dyne).

Effects of Force on Objects

Force can bring different changes in objects depending on how it is applied. These changes can be easily observed in our daily life when we push, pull, or hit objects.

• Change its state of rest
• Change its state of motion
• Change its direction:
• Change its speed
• Change its size or shape

Each of these effects shows how force can influence the condition and movement of an object in different ways.

These effects show that force can start motion, stop motion, or even change the shape of objects.

Read More: Effects of Force: How Force Changes Objects

Understanding the Magnitude of Force

The magnitude of a force is the strength of the force acting on an object. It depends upon the number of forces involved in a particular action.

When two or more forces act in the same direction, then the magnitude of the force on the object is the sum of the forces. When two or more forces act in the opposite direction, then the magnitude of the force on the object will be the difference of the forces.

If the magnitude of force on an object changes, the effects of the force will also change. For example, if we apply a small force to an inflated balloon, it will get deformed. But if we keep increasing the magnitude of force, at a certain force, the balloon will burst.

If two boys are applying force on a box in the same direction, it will add up, and the total force will increase. If the two boys are pushing the same block but in opposite directions with equal force, then the forces cancel each other, and the body remains stationary.

Force depends on both magnitude and direction, hence it is a vector quantity. Forces that are equal in size but opposite in direction are called balanced forces. Thus, the net resultant force acting on a body is equal to zero. Balanced forces do not cause a change in the state of motion of objects.

Forces that cause a change in the state of motion of objects are called unbalanced forces. They are unequal in magnitude. Their direction can be the same or different, but the net resultant force acting on a body will have a particular direction and magnitude.

Read More: Types of Forces

In this article, we understood force as a push or pull, its effects, magnitude, and the difference between balanced and unbalanced forces. These concepts help us to understand so many real-life movements and interactions around us.