[Daily Question] Theoretical Basis 2020.02.04
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Multiple choice questions : The weight is placed on an inclined plane with an inclination angle θ, and the sliding friction coefficient between the two is f (see figure). In order for the block to remain stationary on the slope, the condition ( ) must be met. Answer: C Tips: Those who can explain the problem-solving process will be given extra rewards, and the answers will be visible in the replies!
tanθ≤f For the force analysis of the object, the downward component of gravity along the inclined plane is Gsinθ, the pressure is Gcosθ, the friction force is fGcosθ, Gsinθ≤fGcosθ, then f≥tanθ.