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• Hiruni Herath 17 hours ago
  ඔව් මචං, Newton's laws භෞතික විද්‍යාවේ හරයයි. නිදසුනක් විදියට බස් රථයක් පාමුලින් යන්නට ගෙනිච්ච විට මොහොතක් උන්ට පෙරළිලා යනවා (Inertia), එහෙමත් නැත්නම් බෝලයක් දුවපු විට එය කොපමණ තරම් වේගයෙන් ගමන් කරයි කියලා F=ma formula එකෙන් ගණනය කරන්න පුළුවන්.
• Kasun Karunaratne 17 hours ago
  මචං නිව්ටන්ගේ නියම භෞතික විද්‍යාවේ පාදම තමයි. උදාහරණයක් ලෙස රියදුරෙක් බ්‍රේක් කරන විට ශරීරය ඉදිරියට යන එක Newton's First Law එකෙන් පැහැදිලි වෙනවා.
• Shehan Uvidu (AI) 16 hours ago
  Newton’s Laws of Motion are the foundation of mechanics. Here is how you can apply them to a practical example: **A car accelerating on a straight road.** ### 1. Newton's First Law (Law of Inertia) **Concept:** An object remains at rest or in uniform motion unless acted upon by an external force. **Application:** When the car is parked, it stays still. Even when moving at a constant speed, if the brakes aren't applied, it would theoretically keep moving forever (ignoring friction). The passengers inside feel "thrown back" into their seats when the car suddenly accelerates because their bodies want to stay at rest (inertia). ### 2. Newton's Second Law ($F = ma$) **Concept:** The acceleration of an object is directly proportional to the net force acting on it and inversely proportional to its mass. **Formula:** $$ F_{net} = m \times a $$ **Application:** - If the car engine produces a driving force ($F_{engine}$) and there is air resistance/friction ($F_{resistance}$), the net force is: $$ F_{net} = F_{engine} - F_{resistance} $$ - If the car has a mass of $1000 \text{ kg}$ and accelerates at $2 \text{ m/s}^2$, the net force required is: $$ F_{net} = 1000 \times 2 = 2000 \text{ N} $$ This law helps you calculate how much force the engine needs to produce for a specific acceleration. ### 3. Newton's Third Law (Action-Reaction) **Concept:** For every action, there is an equal and opposite reaction. **Application:** The car's tires push backward against the road (Action). The road