Let us consider some day to day activities in our life. These might most probably include running, catching a ball, hitting a ball from bat, goal keeping, jumping, etc. In all such activities we are changing the state of motion of some object, i.e. either an object is made to come at rest or to move faster or to change its direction of motion. In science, a push or a pull on an object is called a force. Thus, we can say that the motion imparted to objects was due to the action of a force.
Students of class 8b explored more about force by performing some extended learning hands-on activities. Students could recall some of their everyday experiences after learning about the topic. They could now easily give answers to few questions like – When does a force come into play? What do you do to make a football move? What do you do to make a moving ball move faster? How does a goalkeeper stop a ball? A hockey player changes the direction of the moving ball with a flick of the stick. How do fielders stop a ball hit by a batsman? What is a force? What can it do to bodies on which it is applied? They could seek answers to such questions through the various activities they performed related to the topic.
Let us see some activities performed on force and pressure performed by the students of class 8B. Force exerted by a charged body on another charged body is known as electrostatic force. This force comes under category of Non-contact forces as because it occurs even when bodies are not in contact.