Circluar Motion Involving Rotations Per Minute

fishyfish

1. The problem statement, all variables and given/known data

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?

2. Relevant equations

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

3. 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?