Unit 09 Force & Pressure | One Shot Lecture | Class 8 Science | New Balochistan Board

The provided video is in Urdu. Below is a full English translation of the lecture presented by the instructor: "Peace be upon you, I hope you are all doing well. I am your instructor, Muhammad Farukh, and today we are starting a new chapter, Unit Number 9: Force and Pressure, for your 8th class. Introduction (0:11-3:37) Motion of any body means when an object changes its position relative to its surroundings. This motion occurs due to force. For example, when you kick a football, use a cycle pedal, or when a fan rotates due to electric force, or an apple falls due to gravitational force, or the moon orbits the earth—all are examples of force. We require force to move an object or to stop it. Force has the ability to start motion, change speed, or change the direction of an object. What is Force? (3:38-8:45) In daily life, we push (to move away) or pull (to bring closer) an object. We can define force as a push or pull applied to a body. It can produce motion in a stationary object or bring a moving object to rest. Types of Forces (8:45-11:13) Weight: Force due to gravity. Friction: Force produced between two surfaces rubbing against each other. Normal Reaction: Force perpendicular to the surface. Air Resistance: Ability of air to resist motion. Tension: Force in a flexible object like a string when pulled. Net and Balanced Forces (11:13-26:22) Net force is the total sum of forces acting on a body. If forces in opposite directions are equal (e.g., 300N vs 300N), the body remains in a balanced state (net force = 0). If they are unequal, it is an unbalanced force, causing motion. The instructor uses examples of a hanging lamp and a moving truck to illustrate these concepts. Mass and Density (26:23-31:47) Density is the relationship between mass and volume (cap D e n s i t y equals cap M a s s / cap V o l u m e). A ship floats because its overall density (due to air inside) is less than water. Pressure (31:48-36:35) Pressure is force applied per unit area (cap P equals cap F / cap A). Its SI unit is the Pascal, which is equivalent to cap N / m squared. The instructor explains how pressure in a pressure cooker helps cook food faster. Pressure in Fluids and Atmospheric Pressure (36:36-51:37) Liquids: Pressure increases with depth. A deeper hole in a container releases water with more force. Inflating a balloon: Air particles collide with walls, creating pressure. Atmospheric Pressure: The air around us has weight and exerts pressure. At sea level, it is about 100 comma 000 cap N / m squared. Examples like a crushed metal can (when vacuumed) or using a straw to drink demonstrate this pressure. Applications: Hydraulic Elevators & Rocket Propulsion (51:38-59:06) Hydraulic Elevators: Use oil to transmit pressure equally, allowing a small force on a small piston to lift heavy objects on a larger piston. Rocket Propulsion: Based on Newton's Third Law (every action has a reaction). Burning fuel creates high-pressure gases pushed out of a small hole (action), resulting in the rocket moving forward (reaction)." Note: This translation summarizes the scientific lecture provided in the video. Unit 09 Force & Pressure | One Shot Lecture | Class 8 Science | New Balochistan Board 📝 Description Unit 09: Force & Pressure – One Shot Lecture | Class 8 Science In this complete one-shot lecture, we will cover Unit 09 – Force and Pressure according to the New Balochistan Board syllabus for Class 8 Science. 📚 In this lecture, you will learn: What is Force? Types of Forces Effects of Force Resultant Force What is Pressure? Pressure formula P = F/A Factors affecting Pressure Pressure in Fluids Atmospheric Pressure Important diagrams Important examples Important formulas and concepts Important points for exams Complete unit revision in one lecture 🎯 For: Class 8 Science Students New Balochistan Board / BBISE 2026 New Syllabus ✅ Easy explanation ✅ Important exam points ✅ Important formulas ✅ Diagrams & examples ✅ One-shot complete revision ✅ Exam-focused lecture Subscribe to M Farukh for Class 8, 9, 10 Science, Chemistry, Physics and Pharmacy lectures. 🏷️ Hashtags #Class8Science #ForceAndPressure #BalochistanBoard #Unit09 #OneShotLecture #BBISE #Class8 #Physics #NewSyllabus #Force #Pressure class 8 science, class 8 science Balochistan board, class 8 force and pressure, unit 9 force and pressure, unit 09 force and pressure, force and pressure class 8, force and pressure one shot, force and pressure one shot lecture, class 8 physics, class 8 physics Balochistan board, force class 8, pressure class 8, types of force class 8, effects of force class 8, resultant force class 8, pressure formula class 8, P=F/A class 8, atmospheric pressure class 8, pressure in fluids class 8, factors affecting pressure, class 8 science new syllabus, new Balochistan board class 8, Balochistan board class 8 science, BBISE class 8 science, class 8 BBISE, class 8 science 2026, class 8 new syllabus