Answer:
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Explanation:
<h3>#CARRY ON LEARNING</h3><h3>#BRAINLITS </h3>
The average rate at which the cable does work is 294,000 J/s.
The given parameters:
- <em>mass, m = 3000 kg</em>
- <em>height, h = 200 m</em>
- <em>time of motion, t = 20 s</em>
The average rate at which the cable does work is calculated as follows;

Thus, the average rate at which the cable does work is 294,000 J/s.
Learn more about energy and power here: brainly.com/question/13387946
The kinetic energy of the electron is

where

is the mass of the electron and v its speed. Since we know the value of the kinetic energy,

, we can find the value of the speed v:
Answer:
to prevent cuz now for my mind when you prevent it it will not happen to you or nothing happened to you