I Learnt Physics Again - Tr. Titus

Energy conservation

Energy hates being trapped. When something is lifted, stretched, or pushed against a force, energy gets stored. It’s quiet. Invisible. Waiting. That’s potential energy, not energy in motion, but energy with intention. The moment the restraint disappears, everything changes. Stored energy begins to unravel into kinetic energy, the energy of motion. What was once position becomes speed. What was once height becomes acceleration. What was once tension becomes movement. It’s not a transfer across space. It’s a transformation. Think of it like a currency exchange. The total amount never changes, it simply changes form. Potential energy is the promise. Kinetic energy is the payoff. And the beautiful part? The universe keeps perfect records. Energy doesn’t vanish. It doesn’t appear from nowhere. It simply shifts between forms, constantly converting, constantly moving, from stillness to motion, from stored power to visible action. Every fall, every swing, every drop is just energy changing its outfit. #physics #universe #quantumexplained

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Prof. Walter Lewin, the famous MIT physicist, often demonstrated Bernoulli’s Principle in his engaging lectures. Bernoulli’s Principle states that as the speed of a fluid increases, its pressure decreases. In his demonstrations, Lewin used simple yet striking experiments—such as blowing between suspended objects or directing airflow over a sheet of paper—to show how faster-moving air creates lower pressure, causing objects to move together or lift. His style of teaching made abstract physics concepts both visual and memorable, leaving students amazed and inspired. #PhysicsInAction #education #knowledge #explorer #foryou explore

Beautiful stuff!

If you’ve ever tried pushing a full suitcase vs an empty one you already know the truth mass matters. Friction depends on how hard two surfaces are pressed together. More mass means more weight which increases the normal force. A larger normal force leads to more friction. But remember friction also depends on the materials touching each other which is described by the coefficient of friction. Save this for your next physics lab. #PhysicsLearning #ScienceExplained #PhysicsFacts #STEMEducation #learnphysics

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The period of a pendulum ⚡ The motion of a pendulum is governed by gravity and inertia. As the bob swings downward, gravitational potential energy converts into kinetic energy. At the lowest point, the speed is maximum. As it rises on the other side, kinetic energy transforms back into potential energy, slowing it down until it momentarily stops and reverses direction. This continuous energy exchange creates periodic motion. For small swings, a remarkable property appears: the time taken for one complete oscillation depends only on the length of the pendulum and the strength of gravity, not on the mass of the bob. This made pendulums extremely valuable for timekeeping and scientific measurement. Friction and air resistance slowly drain energy, which is why real pendulums eventually come to rest unless driven by an external force. Applications of a pendulum Pendulums have played a foundational role in science and technology. They were the heart of early mechanical clocks, enabling accurate measurement of time for centuries. In physics, pendulums are used to measure gravitational acceleration and to demonstrate fundamental concepts like harmonic motion, energy conservation, and resonance. Large pendulums are used in earthquake detection instruments, where tiny ground vibrations can be detected through changes in oscillation. In engineering, pendulum based systems help stabilize tall buildings and bridges by counteracting oscillations caused by wind or seismic activity. Even in everyday life, playground swings and metronomes rely on the same physics. In essence, the pendulum shows how simple motion can reveal deep laws of nature, connecting gravity, time, and energy in one elegant system. #science #PHYSICS #math

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Hooke's Law is a principle in physics that describes the force required to stretch or compress an elastic object, such as a spring. The law states that the force (F) is directly proportional to the distance (x) of the stretch or compression from its resting position. It is expressed by the equation (mathbf{F=-kx}), where (k) is the spring constant, a measure of the spring's stiffness, and the negative sign indicates the force acts in the opposite direction to the displacement (a restoring force). The spring constant (k) is typically measured in newtons per meter ((mathbf{N/m})). #physics #sciencereels #walterlewin #physicsindailylife