Sign up for free to keep watching this solution

Solution: A disk with radius R has mass per unit area that depends on ...

Question

A disk with radius R has mass per unit area that depends on the radius as dm/dA = α/r for 0 < r ≤ R with α positive and constant. What is the mass of the disk?

[a] παR

[b] 1/3 παR3

[c] παR2

[d] α ln R

[e] 2 παR