A Dump Truck Has a Large Cubical Concrete Block in Its

question 16

Multiple Choice

A dump truck has a large cubical concrete block in its bed.The coefficients of friction between this block and the floor of the bed are µ_k = 0.450 and µ_s = 0.650.As the bed is slowly tilted above the horizontal,will the brick first begin to slide or will it first tip over?

• A) It will first tip over.
• B) It will first begin to slide.
• C) It will tip over just as it begins to slide.
• D) It is impossible to answer without knowing the mass of the block.
• E) It is impossible to answer without knowing the dimensions of the block.

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