微积分数学题.求教A waterskier skis over the ramp shown in the figure at a speed of 12m/s. Base of the ramp is 5m,the altitude is 2m.How fast is the waterskier rising as she leavesthe ramp?
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![微积分数学题.求教A waterskier skis over the ramp shown in the figure at a speed of 12m/s. Base of the ramp is 5m,the altitude is 2m.How fast is the waterskier rising as she leavesthe ramp?](/uploads/image/z/8516829-21-9.jpg?t=%E5%BE%AE%E7%A7%AF%E5%88%86%E6%95%B0%E5%AD%A6%E9%A2%98.%E6%B1%82%E6%95%99A+waterskier+skis+over+the+ramp+shown+in+the+figure+at+a+speed+of+12m%2Fs.+Base+of+the+ramp+is+5m%2Cthe+altitude+is+2m.How+fast+is+the+waterskier+rising+as+she+leavesthe+ramp%3F)
微积分数学题.求教A waterskier skis over the ramp shown in the figure at a speed of 12m/s. Base of the ramp is 5m,the altitude is 2m.How fast is the waterskier rising as she leavesthe ramp?
微积分数学题.求教
A waterskier skis over the ramp shown in the figure at a speed of 12m/s. Base of the ramp is 5m,the altitude is 2m.How fast is the waterskier rising as she leavesthe ramp?
微积分数学题.求教A waterskier skis over the ramp shown in the figure at a speed of 12m/s. Base of the ramp is 5m,the altitude is 2m.How fast is the waterskier rising as she leavesthe ramp?
Let the altitude be y,the length of the ramp be L
the length of the base of the ramp be x
L² = x² + y ²
dL/dt = 12 m/s
dy/dt = dL/dt sinα
= 12×2/√29
= 24/√29
= 4.46 (m/s)