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.

Question

Quizplus · Accepted Answer

The block will begin to slide when the angle of tilt causes the static friction to be overcome. Since the static friction coefficient is given, we can calculate the angle at which sliding begins. Tipping depends on the block's dimensions, but since the problem does not provide these, we assume sliding occurs first.

A Dump Truck Has a Large Cubical Concrete Block in Its