Class 8

[Audio] Good morning everyone, Let's talk today about force, something that affects our everyday lives whether we realize it or not. Force is an invisible form of energy that affects objects when they interact with each other. It is an action performed on an object that changes its direction or state of motion. Force can be either a push or a pull, and can be further described by its magnitude or its direction. Forces can be found in nature and everyday life, from the movement of the planets in our solar system to the weight of an object. Understanding the forces that act on us can help us better understand how the world around us works..

[Audio] The push or pull of force can bring about a change in direction or state of motion when applied to objects. An example of this would be the thrust from the rocket engines which propels the rocket in its desired direction. Force applied to a hammer drives a nail into a surface and force applied to a ball determines its direction and speed..

[Audio] Force is described as a push or pull, and is not something that can be seen, though its effects can be observed. An example of a push can be when a force is used to move an object away from one's body, such as when playing a guitar or sawing wood. A pull would be when a force is used to move an object towards one's body, like when scrubbing the floor or rowing a boat. In short, force is a push or pull that leads to a change in the direction or state of motion of a body when it interacts with another object..

[Audio] Force is a push or pull capable of causing a shift in the direction or speed of an object when interacting with another object. In this slide, we shall look at the relation between force and pressure as well as the implications of force. We shall begin by examining the introduction of force before understanding the impacts of forces, for instance, friction. By recognizing the fundamentals of force and pressure, we can comprehend better how the objects in our surrounding move and interact..

[Audio] We are currently looking at a slide discussing two forms of force. The first is a push, which is a force directed away from a body, such as when one hits a snooker ball or kicks a football. The second type of force is magnetic, which is the attraction or repulsion between two magnetic bodies due to their poles. Gaining an understanding of these forces can be beneficial in gaining an understanding of many aspects of our daily lives..

[Audio] When two objects interact, force can cause a change in the direction or state of motion of the body. Attraction is when two objects move towards one another, like a magnet to a piece of metal. Repulsion is when two objects move away from each other, like two balloons when blown up. Rotation happens when an object rotates about a fixed point, such as a wheel turning on its axle. All these phenomena can be explained by the concept of force..

[Audio] Friction is a key contact force with which we come into contact in day-to-day life. It is the force that counters the motion of two objects when they collide. Friction is produced by the roughness of the objects in contact. It can act in two directions and is determined by the items involved, for instance two metallic pieces will generate more friction than two cloth pieces. Friction can be advantageous and it can also generate problems, if it is too strong it can slow down the speed and effectiveness of objects. To reduce the impacts of friction we can utilize lubricants to stop direct contact among surfaces, and this assists in reducing the power required to move items..