Asked by Rod
                A soild wheel initially rotating at 50.0 rad/s comes to a uniform stop after 8.00 rotations. 
Calculate the tangential accleration at the rim. Given that the angular acceleration is -24.9 rad/s^2.
I know its aT = r alpha but how do I get the radius?
            
        Calculate the tangential accleration at the rim. Given that the angular acceleration is -24.9 rad/s^2.
I know its aT = r alpha but how do I get the radius?
Answers
                    Answered by
            bobpursley
            
     The intial velocity was 50rad/sec* radius.  The acceleration is -24.9*r m/s^2
vf^2=vi^2 + 2a*d
0=2500r^2+ 2(-24.9)r*2PIr*8
solve for r.
check my thinking.
    
vf^2=vi^2 + 2a*d
0=2500r^2+ 2(-24.9)r*2PIr*8
solve for r.
check my thinking.
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