Determine the magnitude of its maximumradial acceleration

[gap0063]

1. Before throwing a 0.821 kg discus, an ath-lete rotates it along a circular path of radius1.19 m. The maximum speed of the discus is18.7 m/s.Determine the magnitude of its maximumradial acceleration.Answer in units of m/s2

Homework Equations

atotal = sq rt (a2 radial + a2 tangential) where aradial = −v2/r and atangential = d|v|/dt

The Attempt at a Solution

I tried using the equation above but I don't think I have enough info or I don't know where the info goes

 

[rock.freak667]

Homework Equations

atotal = sq rt (a2 radial + a2 tangential) where aradial = −v2/r and atangential = d|v|/dt

So you have a_radial=v²/r

v= velocity and r= radius, both of which you are given.