 A shot putter launches a 7.260 kg shot by pushing it along a straight line of length 1.650 m and at an angle of 

 from the horizontal, accelerating the shot to the launch speed from its initial speed of 

 (which is due to the athlete's preliminary motion). The shot leaves the hand at a height of 2.110 m and at an angle of 

, and it lands at a horizontal distance of 15.90 m . What is the magnitude of the athlete's average force on the shot during the acceleration phase? (Hint: Treat the motion during the acceleration phase as though it were along a ramp at the given angle.)

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5.P.68

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