Helen needs a replacement ball bearing for this part. The surface area of each spherical ball bearing is approximately 452.16 sq
1 answer:
Helen needs a replacement ball bearing whose radius is 5.99mm
A sphere is a perfectly round geometrical 3-dimensional object. It can be characterized as the set of all points located distance r (radius) away from a given point (center). It is perfectly symmetrical, and has no edges or vertices.
The formula of surface area of the sphere is where r represents radius
Given: Surface area of ball = 452.16
Using formula we get,
= 452.16
r^2 = 452.16/4
r = 5.99 mm
Thus Helen needs a replacement ball bearing whose radius is 5.99mm
Learn more about Surface area here :
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(See the attached plot; the given surface is orange, (0, 0, 8) is the black point, the tangent plane is blue, and the red line is the normal at this point)
This is how we were asked to do it. Different teachers ask for different reasons . Hope this helps!
