A 70 ?? skier starts to slide from ? = 25 ? above the jumping ramp as shown in the figure and jumps off the ramp at an angle of ? = 30°. If the ramp is frictionless and the effect of air resistance is neglected, (a) What is the maximum height ℎ that the skier can reach after jumping off the ramp? (b)If the skier had increased his weight by putting on a backpack, would the height ℎ be higher, lower, or remain the same? Explain. (c) If there was air resistance, would the height ℎ be higher, lower, or remain the same? Explain.
A 70 ?? skier starts to slide from ? = 25 ? above the jumping ramp as shown in the figure and jumps off the ramp at an angle of ? = 30°. If the ramp is frictionless and the effect of air resistance is neglected, (a) What is the maximum height ℎ that the skier can reach after jumping off the ramp? (b)If the skier had increased his weight by putting on a backpack, would the height ℎ be higher, lower, or remain the same? Explain. (c) If there was air resistance, would the height ℎ be higher, lower, or remain the same? Explain. (d) What would ℎ be if the length of the path above the jump point of the ramp (i.e., the part of the path above the dashed line according to the figure) were ? = 50 ? and the coefficient of the kinetic friction ?? = 0.2?
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