An ordinary workshop grindstone has a radius of 8.50 cm and rotates at 6500 rpm. (a) Calculate the centripetal

An ordinary workshop grindstone has a radius of 8.50 cm and rotates at 6500 rpm.
(a) Calculate the centripetal acceleration at its edge in m/s2 and convert it to multiples of g.
(b) What is the linear speed of a point on its edge?

2.
ω =2*π N = 2*π*6500/60 = 680.7 rad /s
a = Rω ² = 0.085*[2*π*6500/60] ² = 39382.5 m/s ²
a =39382.5 / 9.8 = 4019 g m/s ²
v = r ω = 0.085*2*π*6500/60 = 57.9 m/s
----------------------------