What is the centripetal acceleration of the hammer in circular motion?

AI Thread Summary
The centripetal acceleration of a 7.00 kg hammer tied to a 1.3 m chain, completing one revolution in 1.0 s, is calculated to be 51 m/s². The formula used is ac = 4π²r/T², where r is the radius and T is the period of rotation. There was confusion regarding the calculation, as the user did not arrive at the correct answer using their method. It was clarified that centripetal acceleration can also be expressed as ac = ω²r or ac = v²/r. Understanding the correct application of these formulas is crucial for solving such problems accurately.
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Homework Statement



An athlete whirls a 7.00 kg hammer tied to the end of a 1.3 m chain in horizontal chain. The hammer makes one complete revolution in 1.0 s.
(A) What is the centripetal acceleration of the hammer? 51 m/s2



Homework Equations


ac=4pi^2*r/r^2


The Attempt at a Solution


I know the formula for centripetal acceleration is as above. but how is the answer 51?
I put it in my calculator and did not get that...
4(3.14^2)(1.3)/1.3^2)

What am i doing wrong??
 
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