Circluar Motion Involving Rotations Per Minute

[fishyfish]

Homework Statement

What is the magnitude of the acceleration of a speck of clay on the edge of a potter's wheel turning at 40 rpm (revolutions per minute) if the wheel's diameter is 35 cm?

Homework Equations

v=2(pi)(r)/t a=(v^2)/r

The Attempt at a Solution

2(3.14)(.175)/.67 = 1.099

(1.099^2)/.175=a

 

[LowlyPion]

Welcome to PF.

Isn't your period 1.5 instead of .67?

You only get 40 revs per min so a rev should be longer than a sec no?