The answer is 0
potential energy= mass• gravity (9.8m/s)• height.
Your mass 3kg. I believe your need to convert this to grams (3000g) and then multiply by 9.8. Since your height is 0 because the ball is on the ground.your potential energy is 0. hope that helped
Answer:
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Explanation:
Using a free body diagram, it is proved that when the object starts to slide, the tangent of the angle of inclination is equal to the coefficient of static friction:
![\mu_s=tan(\beta )](https://tex.z-dn.net/?f=%5Cmu_s%3Dtan%28%5Cbeta%20%29)
Hence, you can use that formula directly:
![0.61=tan(\beta )\\ \\ \beta =arctan(0.61)\\ \\ \beta =31.38\º](https://tex.z-dn.net/?f=0.61%3Dtan%28%5Cbeta%20%29%5C%5C%20%5C%5C%20%5Cbeta%20%3Darctan%280.61%29%5C%5C%20%5C%5C%20%5Cbeta%20%3D31.38%5C%C2%BA)
Rounding to the nearest degree that is 31º.
Answer:
W = 100000 J = 100 KJ
Explanation:
Here we will use the most basic and general formula of work, which is as follows:
![W = Fd](https://tex.z-dn.net/?f=W%20%3D%20Fd)
where,
W = Work Done = ?
F = Force Required = 200 N
d = Length of Track = 500 m
Therefore,
![W = (200\ N)(500\ m)\\](https://tex.z-dn.net/?f=W%20%3D%20%28200%5C%20N%29%28500%5C%20m%29%5C%5C)
<u>W = 100000 J = 100 KJ</u>
Answer:
lubricant (decrease friction).
control production speed.
use only when required.