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Coco12
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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??