(1)
- Mass of the load, in kilograms.
- Mass of the athlete, in kilograms.
- Gravitational acceleration, in meters per square second.
, 
, 
- Distances with respect to the feet, in meters.
- Upward force exerted by his two arms, in newtons.
, 
, 
, 
, 
and 
, then the upward force is:![F = \frac{[(6\,kg)\cdot (1.20\,m)+(70\,kg)\cdot (0.90\,m)]\cdot \left(9.807\,\frac{m}{s^{2}} \right)}{1.30\,m}](/tpl/images/1399/3076/2e530.png)
Please please helpjejejnebwbww
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Answers: 3
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