Using a simple pulley/rope system, a crewman on an arctic expedition is trying to lower a 5.26 kg crate to the bottom of a steep ravine of height 28.6 meters. the 60.9 kg crewman is being careful to lower the crate at a constant speed of 1.50m/s. unfortunately, when the crate reaches a point 15.9 meters above the ground, the crewman slips and the crate immediately accelerates toward the ground, dragging the hapless crewman across the ice and toward the edge of the cliff.
if we assume the ice is perfectly slick ( that is no friction between the crewman and the ice once he slips and falls down), at what speed will the crate hit the ground? assume also that the rope is long enough to allow the crate to hit the ground before the crewman slides over the side of the cliff.

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at what speed will the crewman hit the bottom of the ravine? (assume no air friction)
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To understand the behavior of the electric field at the surface of a conductor, and its relationship to surface charge on the conductor. a conductor is placed in an external electrostatic field. the external field is uniform before the conductor is placed within it. the conductor is completely isolated from any source of current or charge. part a: which of the following describes the electric field inside this conductor? it is in the same direction as the original external field.it is in the opposite direction from that of the original external field.it has a direction determined entirely by the charge on its surface.it is always zero. part b: the charge density inside the conductor is: 0non-zero; but uniformnon-zero; non-uniforminfinite part c: assume that at some point just outside the surface of the conductor, the electric field has magnitude e and is directed toward the surface of the conductor. what is the charge density η on the surface of the conductor at that point? express your answer in terms of e and ϵ0