PHYSICS

A field is a region of space around an object where another object experiences a force. A field cannot normally be seen directly, but its effects can be observed when objects placed within it experience a force. Examples 1. A magnet attracts an iron nail without touching it because there is a magnetic field around the magnet. 2. The Earth attracts objects towards its centre because of its gravitational field. 3. An electrically charged object can attract or repel another charged object because of an electric field.  Types of Fields The major types of fields include: 1. Gravitational field 2. Magnetic field 3. Electric field  Gravitational Field A gravitational field is the region around a mass where another mass experiences a gravitational force. The Earth has a gravitational field around it. This is why objects released above the ground fall towards the Earth. Examples of objects under gravitational field  1. A stone falling to the ground. 2. Rain...

Force is an action  that changes or tends to change the state of rest or of uniform motion in straight line.  The S.I unit of force is the newton (N) . Force is measured using an instrument called a spring balance or Newton meter. Examples of Force i. Pushing a door open. ii. Pulling a bucket from a well. iii. Kicking a football. iv. Lifting a school bag. v. Pushing a table etc   Types of Force The two types of force are: (1) Contact force  (2) Non-contact (or Field) force Contact Force This is a force that acts when objects are physically touching each other. Examples of contact force include: I. Push II. Pull III. Friction: Force that opposes motion between surfaces. IV. Tension: Force acting through a rope or string. B. Non-Contact Force This is a force that acts without physical contact between objects. Examples include: I. Gravitational force: Force that pulls objects towards the Earth. II. Magnetic force: Force of attraction or repulsion between magnets. III. E...

Physics is a branch of pure science that deals with the study of matter, energy, motion, forces and how they interact with one another. Physics helps us to understand many things that happen around us, such as why objects fall to the ground, how vehicles move, how light travels, how electricity works and how sound is produced. A person who studies physics is called a physicist. Branches of Physics Physics is divided into several major branches. They include: 1. Mechanics 2. Waves 3.  Optics 4. Nuclear Physics 5. Electromagnetism 6. Thermodynamics Mechanics : Mechanics is the study of the motion and rest of objects and the forces acting on them. Waves : Waves is the study of how energy moves from one place to another. Optics : Optics is the study of light and how it behaves. Nuclear Physics:   Nuclear physics is the study of the nucleus of an atom and its energy. Electromagnetism : Electromagnetism is the study of the relationship between electricity and magnetism. The...