In a potential energy measurement experiment, why should an object be lifted slowly at a constant velocity? Lifting a stationary object causes a ‘some’ change in the object’s motion. You need force…
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Conservation of Mechanical Energy If you look at the roller coasters, you can find something very interesting. That’s right, there is no engine on the roller coaster. When we lift the roller…
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They know how, but they can’t tell the principle. “How can you go so high?” In the world, there are some principles are difficult to describe in words even if everyone knows…
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Photoelectric Effect The photoelectric effect is a phenomenon where electrons pop out when a light beam is incident on a metal surface. Simply think, the energy of light is transformed into the…
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Photoelectric Effect The photoelectric effect is a phenomenon where electrons pop out when a light beam is incident on a metal surface. Simply think, the energy of light is transformed into the…
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Mechanical energy Mechanical energy is the sum of potential and kinetic energy. Mechanical energy = potential energy + kinetic energy Em = EP + EK Mechanical energy conservation Without friction, the sum…
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Movable Pulley Movable pulleys can move axes, unlike fixed pulleys. Movable pulleys have the advantage of being able to move with less force. But, the distance that I have to move is…
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Movable Pulley Movable pulleys can move axes, unlike fixed pulleys. Movable pulleys have the advantage of being able to move with less force. But, the distance that I have to move is…
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Kinetic energy All moving objects have kinetic energy. The kinetic energy Ek of an object with a mass of ‘m’ and a velocity of ‘v’ can be calculated as follows. \[E_{ k…
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Let’s combine various gears by dragging the screen. How can I combine to speed up? How can I combine to slow it down?