Antwon made a table to study some simple machines. which best describes how to correct the error in the table? a remove "can also be used to lift objects" from the description of a screw. b add "looks like two inclined planes placed back-to-back" to the description of a wheel and axle. b move "reduces friction when object is being moved" to the description of a pulley. d change "decreases distance" to "increases distance" in the description of an inclined plane.

This problem has been solved! see the answera non-uniform fire escape ladder is 6.0m long whenextended to the icy alley below. it is held at the top by africtionless pivot, and there is neglibible frictional force fromthe icy surface at the bottom. the ladder weighs 250n, and it'scenter of gravity is 2.0m along the ladder from the bottom. amother and child of total weight 750n are on the ladder 1.5m fromthe pivot. the ladder makes an angle θ with the horizontal.find the magnitude and direction ofa) the force exerted by the icy alley on the ladderb) the force exerted by the ladder on the pivotc) do your answers in part a and b depend on the angle?

Explain what it means to view something from a frame of reference. provide an example that illustrates your explanation. (4 points)

Charge is distributed along the entire x-axis with uniform density λ. how much work does the electric field of this charge distribution do on an electron that moves along the y-axis from y = a to y = b? (use the following as necessary: a, b, ε0, λ, and q for the charge on an electron.)