)A boy starts at rest and slides down a frictionless slide. The bottom of the track is a heighth above the ground. The boy then leaves the track horizontally, striking the ground at a distanced as shown. Using energy methods, determine the initial heightH of the boy above the ground in terms ofh andd.2)A very long uniform line of charge has charge per unit length 3.60 µC/m and lies along the x-axis. A second long uniform line of charge has charge -2.75 µC/m per unit length and is parallel to the x-axis at y = 0.400 m. What is the net electric field (magnitude and direction) at the following points on the y-axis?
(b) y = 0.600 m
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