Un esquiador parte del reposo desde la parte superior en A de una pendiente de 20 m de altura y desliza sobre ella 60 m hasta B y luego se desplaza una cierta distancia ‘d’ sobre la superficie horizontal hasta detenerse en C. El coeficiente de fricción en toda la superficie es de 0,25. Determinar: a) La velocidad al final de la pendiente en B
b) La distancia ‘d’ entre B y C
c) La velocidad en C en caso de no existir la fricción en su recorrido

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?

Assume that a person skiing high in the mountains at an altitude of h = 15100 ft takes in the same volume of air with each breath as she does while walking at sea level. determine the ratio of the mass of oxygen inhaled for each breath at this high altitude compared to that at sea level. assume that the air composition (i. e. % of air that is oxygen) is the same at sea level as it is at 15100 ft.

You charge a parallel-plate capacitor, remove it from the battery, and prevent the wires connected to the plates from touching each other. when you increase the plate separation, what happens to the following quantities?