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cjhenson02
09.11.2020 •
Mathematics
In the rope climb, a 75 kg athlete climbs a vertical distance of 5.0 m in 9.0 s. What minimum power output was used to accomplish this feat? ___ W
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Ответ:
The minimum power output used to accomplish this feat is 408.625 watts.
Step-by-step explanation:
The minimum power is that needed to overcome potential gravitational energy at constant velocity. From Principle of Energy Conservation, Work-Energy Theorem and definition of power we obtain the following relationship:
Where:
By the consideration of constant velocity, we get that the climbing rate is represented by:
Where:
And by substituting on (Eq. 1), the following expression is found:
If we know that
,
,
and
, then the minimum power output is:
The minimum power output used to accomplish this feat is 408.625 watts.
Ответ:
0.3300001
0.335
0.3399999