In the hammer throw, a wire exerts this force on the hammer, keeping it moving in a circle
The hammer throw 
is a track-and-field event in which the thrower swings a heavy metal ball (the 
hammer) on a wire in a circular motion, then releases the wire, sending the ... 
force keeping the hammer moving in a circle is 7.43 103 N. What will the 
hammer's... [DOC] [TLE] Reassessing velocity generation in hammer throwing - IAAF [PAR] circle.