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The hammer throw is a track-and-field event in which a 7.2-kg ball (the ''hammer''), starting from...

The hammer throw is a track-and-field event in which a 7.2-kg ball (the ''hammer''), starting from rest, is whirled around in a circle several times and released. It then moves upward on the familiar curving path of projectile motion. In one throw, the hammer is given a speed of 23.0 m/s. For comparison, a .22 caliber bullet has a mass of 2.6 g and, starting from rest, exits the barrel of a gun with a speed of 400 m/s. Determine the work done to launch the motion of both the hammer and the bullet.

(a) the hammer
  J

(b) the bullet
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