Estimate the average force exerted by a shot-putter on a 7.0-kg shot if the shot is moved a distance

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Estimate the average force exerted by a shot-putter on a 7.0-kg shot if the shot is moved through a distance of 2.8 m and is released with a speed of 13 m/s. .
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What I don’t understand is why are we assuming that the object is stopping at 2.8 meters? It never mentions that it ends at 2.8 meters, it just says that it have traveled 2.8 meters, never says landed.

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-13^2 = 169 not -169 so your answer would be positive not negative

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