How do i work out the mass of a flywheel. I am given the density as 7800kg/m3, a 760mm diameter and a 180mm width.
Please help
mass = density x volume
volume = πr^2 h , of the flywheel
diameter = 760 mm
radius = 380 mm = .38 m
height = 180 mm = .18 m
volume = π(.38^2)(.18)m^3 x 7800 kg/m^3
= appr 636.9 kg
check my calculations, and check for any required significant digits.