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[SUMMARY]This blog page intuitively applies uniform acceleration, non-dimensionalization of speeds/time, velocity graphs, and momentum conservation to solve a Korean high school mechanics exam. [Problem]As shown in figure (a), object A moves on a horizontal plane with speed 4v. After passing through a friction zone, it continues with uniform motion. Object B moves toward A with speed v.As shown ..

[SUMMARY]This blog page intuitively analyzes a Korean high school optics exam using reversibility of light, refraction angles, and total internal reflection. [Question](a) As shown in the figure, quarter-circular media A and B, with the same radius, are placed on a horizontal plane, and monochromatic light is incident on either A or B.(b) By varying the height of the point at which the monochrom..

[SUMMARY]This blog post intuitively uses action–reaction, non-dimensionalization of masses and speeds, energy partitioning, and height–energy relations to crack a Korean high-school mechanics exam. As shown in the figure, on a plane of height h1, objects A and B of masses 3m and 2m, respectively, compress spring P by a distance d from its natural length and are then released from rest.Object A p..

[SUMMARY]This blog page intuitively applies uniform acceleration, time-triangle area analysis, non-dimensionalization, energy change comparison, and F=ma to solve a Korean high-school mechanics exam. As shown in the figure, on a cart of mass M placed on a horizontal plane, one of the two weights A and B is placed on top of the cart, and the other is hung from a string connected to the cart. The..

[SUMMARY]This blog page intuitively uses imagined particle motion, wave animation, periodic shifts, and phase tracking to solve a Korean high-school wave exam, with a Python program provided to animate wave motion. The figure shows the displacement of a wave with frequency 0.75 Hz propagating in the +x direction, as a function of position x. The solid line and the dotted line represent the wave ..

[SUMMARY]This blog page intuitively uses light refraction, car-analogy, triangle symmetry, reversibility of rays, and simple geometry to solve a Korean high-school optics exam. As shown in the figure, monochromatic light X enters medium B from medium A with an angle of incidence θ, and then undergoes total internal reflection at the boundary between medium C and medium A. Which of the following..

[SUMMARY]This blog page intuitively uses inverse-problem reasoning, energy flow tables, non-dimensionalization, and backward inference to solve a Korean high-school mechanics exam.As shown in the figure, object A is released from rest at a height of 4h. It passes through friction region I and collides with object B, which was initially at rest on a plane at height h. After the collision, A again..

1. https://pcpkorea.tistory.com/13 The 1, 3, 5, 7 Rule in Uniform Acceleration[Problem]As shown in the figure, when car A passes reference line P with speed v₀, car B, which had been at rest at reference line Q, starts moving. Both A and B undergo uniformly accelerated motion parallel to the straight road and pass reference line Rpcpkorea.tistory.com 2. https://pcpkorea.tistory.com/14 Taming the..