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Why does a string remain taut in circular motion? By stipulation, the object is undergoing uniform circular motion thus, the distance from the center of the circle to the object is constant. This implies that the object experiences a constant radial acceleration towards the center that is orthogonal to the velocity of the object. But this implies that ...


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Are you aware that centripetal force is the net force on an object towards the center, and not a "real physical" force? It's simply an expression of other, more physical forces, such as tension, gravity, or friction. Therefore it can't be balanced. Also, you must understand the difference between velocity and acceleration here. If the object on the string ...


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Something moving in a circle at steady speed is experiencing constant inward accelleration. From F = mA, we know that this requires a force on a object to accellerate it, and that force is proportional to the mass of the object and the accelleration. In the case of a car going around at circle at steady speed, that force comes from the ground pushing on ...


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Friction forces act as a response, and opposite, to velocity, not force (that would be normal forces). The car has a liner velocity in the forward direction, and it keeps moving indefinitely, ignoring any residual friction. Then, if the steering wheel is turned left, the front tires are rotated to the left, thus there appears a frictional force ...


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Until general relativity is included, all that Javier says applies. However, once we apply general relativity and large amounts of moving mass, we find an effect called "frame dragging", which basically means the definition of inertia gets dragged along moving mass. That is, if you are near a massive body, it will seem you are moving inertially if you copy ...


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The answer is that not everything is relative. Indeed, you've just shown that it is possible to detect rotation in an absolute sense. More generally, the principle of relativity says that all inertial frames are equivalent. In other words, it is impossible to detect (or even to define) absolute motion at a uniform velocity; it doesn't make sense to say that ...


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In short, you are right, the pendulum has an angle with respect to the gravity vector, but your reference frame has this same angle, making then aligned. A 1-D coordinated turn is a turn such that the horizontal component of the lift is equal and opposite to the force generated by centrifugal acceleration. E.g like this: Obtained from Free online pilot ...



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