எங்கள் ஆசிரியர்களுடன் 1-ஆன்-1 ஆலோசனை நேரத்தைப் பெறுங்கள். டாப்பர் ஆவதற்கு நாங்கள் பயிற்சி அளிப்போம்

Book Free Demo
In previous classes, you have learnt how objects move.
A man pulls the cart
Do you recall how we can decide whether an object is moving faster than the other? What does the distance move by an object in unit time indicate?
You are also aware that a moving object slows down, such as a ball rolling on the ground. The ball has the ability to change its direction of motion at any time. It is also possible that the ball will slow down and change course.
Ball rolling on the ground
Did you ever wonder what makes an object slow down or go faster or change its direction of motion?  
Let us think about some of our everyday encounters. What are the steps to making a football move? How do you get a moving ball to move faster? What is the best way for a goalkeeper to stop a ball? How does a fielder prevent a batsman from hitting a ball? With a flick of the stick, a hockey player can change the direction of the moving ball. In each of these cases, the ball is either made to move faster or slower, or its direction of motion is changed.
When a ball is kicked, pushed, thrown, or flicked, we say it has been subjected to force. What exactly is a force? What can it do to bodies on which it is applied? In this chapter, we will look for answers to such questions.
Picking, opening, closing, kicking, hitting, lifting, flicking, pushing, and pulling are all actions that are commonly used to describe certain tasks. Each of these actions usually causes an object's motion to change in some way. Is it possible to substitute one or more terms for these?
Do you see how each of these actions can be classified as a pull, a push, or both? Is it possible to deduce from this that an object must be pushed or pulled to move?
A push or pull that changes the position, size, shape and speed of the moving body is called force. It can also change the direction of the moving body. Force is measured in terms of newton.
A man pushes the door to open
The baseball player hits the ball by applying force