The reason for radiation pressure on a perfectly reflecting surface to be twice of radiation pressure on a perfectly absorbing surface.

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Two blocks, A and B (with mass 45 kg and 120 kg, respectively), are connected by a string, as shown in the figure below. The pulley is frictionless and of negligible mass. The coefficient of kinetic friction between block A and the incline is μk = 0.26. Determine the change in the kinetic energy of block A as it moves from to ①, a distance of 15 m up the incline (and block B drops downward a distance of 15 m) if the system starts from rest. ] 37° A © B

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Chapter 34, Problem 34.2CQ

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The reason for radiation pressure on a perfectly reflecting surface to be twice of radiation pressure on a perfectly absorbing surface.

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