Quick units question on uniform circular acc

[tigerlili]

Homework Statement

A centripetal-acceleration addict rides in uniform circular motion with period T = 2.3 s and radius r = 2.80 m. At t1 his acceleration is = (6.60 m/s2) + (-2.40 m/s2). At that instant, what are the values of (a)v dot a and (b) r X a ?

Homework Equations

i know the answers, I am just really unsure of the units

The Attempt at a Solution

the answers are both zero but what are the units?

 

[kuruman]

Can you do dimensional analysis? For example v dot a has dimensions of velocity times dimensions of acceleration.

 

[tigerlili]

yeah, i got it, i just wasn't sure if that was quite the right approach
thanks though