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Class 11

Class 11, Friction, JEE, Laws of Motion

The coefficient of static friction between a wooden block of mass 0.5 kg and a vertical rough wall is 0.2. What is the minimum horizontal force (in newtons) that must be applied to the block to keep it adhered to the wall? (take g = 10 m/s²)

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Class 11, Friction, JEE, Laws of Motion

An inclined plane is bent in such a way that the vertical cross-section is given by 𝑦 = 𝑥²/4, where y is in vertical and x in horizontal direction. If the upper surface of this curved plane is rough with coefficient of friction μ = 0.5, determine the greatest vertical height (in cm) at which the block can remain at rest without sliding down the surface.

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