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Question
Math
Posted 10 months ago
Calculate the volume of the solid formed by rotating the area between y=x2y = x^2 and y=0y = 0 around the x-axis from x=0x = 0 to x=1x = 1.
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Answer from Sia
Posted 10 months ago
Solution by Steps
step 1
To find the volume of the solid formed by rotating the area between y=x2y = x^2 and y=0y = 0 around the x-axis, we use the disk method
step 2
The volume VV of the solid is given by the integral V=abπr2dxV = \int_{a}^{b} \pi r^2 dx, where rr is the radius of the disk at a given xx, which is y=x2y = x^2 in this case
step 3
Substituting y=x2y = x^2 into the formula for volume, we get V=01π(x2)2dx=01πx4dxV = \int_{0}^{1} \pi (x^2)^2 dx = \int_{0}^{1} \pi x^4 dx
step 4
Using the asksia-ll calculator result, we have 01πx4dx=πx5501\int_{0}^{1} \pi x^4 dx = \frac{\pi x^5}{5} \Big|_0^1
step 5
Evaluating the integral from 00 to 11, we get π(1)55π(0)55=π5\frac{\pi (1)^5}{5} - \frac{\pi (0)^5}{5} = \frac{\pi}{5}
Answer
The volume of the solid is π5\frac{\pi}{5} cubic units.
Key Concept
Disk Method for Volume
Explanation
The disk method involves integrating the area of circular disks along the axis of revolution to find the volume of the solid formed.

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