The answer is 4, well because stress don't bring your mental health down and learning how to stay focused will just help you more
Potential energy is energy stored in an object. kinetic energy is energy of motion
The work done on the sail is 600 J
Explanation:
The work done to lift the sail is equal to the gain in gravitational potential energy of the sail, therefore is:
![W=mg\Delta h](https://tex.z-dn.net/?f=W%3Dmg%5CDelta%20h)
where
m is the mass of the sail
g is the acceleration of gravity
(mg) is the weight of the sail
is the change in height of the sail
In this problem we have
mg = 150 N (weight)
![\Delta h = 4.0 m](https://tex.z-dn.net/?f=%5CDelta%20h%20%3D%204.0%20m)
Substituting, we find the work done:
![W=(150)(4.0)=600 J](https://tex.z-dn.net/?f=W%3D%28150%29%284.0%29%3D600%20J)
Learn more about work:
brainly.com/question/6763771
brainly.com/question/6443626
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