29 Jul '10 19:38

I see F=(mv^2)/r so why does mass come into it? What does m represent? The mass of the disk or are we saying it would be more like a rock on a sling? How do I get the answer in terms of G's, 1G = 1 Earth gravity? And what is the unit for F? Newtons if you use metric?

I am trying to figure the g forces on a magnetic disk HD, the regular 3.5 inch variety, looks like about 89 or 90 mm in diameter. They spin at 5400 to 15,000 RPM and I wanted to know the g forces on the disk. Converting to a g force, doesn't that remove mass from the equation?

I am trying to figure the g forces on a magnetic disk HD, the regular 3.5 inch variety, looks like about 89 or 90 mm in diameter. They spin at 5400 to 15,000 RPM and I wanted to know the g forces on the disk. Converting to a g force, doesn't that remove mass from the equation?