The gravitational potential energy is 25.6 J
Explanation:
The gravitational potential energy (GPE) of an object is given by:
![GPE = mgh](https://tex.z-dn.net/?f=GPE%20%3D%20mgh)
where
m is the mass of the object
g is the gravitational field strength
h is the height of the object above the ground
In this problem, we have
m = 8 kg is the mass of the brick
g = 1.6 N/kg is the gravitational field strength on the moon
h = 2 m is the height of the brick above the ground
Substituting,
![GPE=(8)(1.6)(2)=25.6 J](https://tex.z-dn.net/?f=GPE%3D%288%29%281.6%29%282%29%3D25.6%20J)
Learn more about gravitational potential energy:
brainly.com/question/1198647
brainly.com/question/10770261
#LearnwithBrainly
Answer:
Therefore letter <u>C is the correct answer.</u>
Explanation:
In a projectile motion the total time in the air can be calculated using the following equation:
We analyze the y-component motion.
![v_{fy}=v_{iy}-gt](https://tex.z-dn.net/?f=v_%7Bfy%7D%3Dv_%7Biy%7D-gt)
When the final velocity (v(f)) is equal to zero we calculate the upward time and multiplying it by 2 we find the total time in the air. So we will have:
![t_{tot}=2\frac{v_{iy}}{g}](https://tex.z-dn.net/?f=t_%7Btot%7D%3D2%5Cfrac%7Bv_%7Biy%7D%7D%7Bg%7D)
![t_{tot}=2\frac{v_{i}sin(\theta)}{g}](https://tex.z-dn.net/?f=t_%7Btot%7D%3D2%5Cfrac%7Bv_%7Bi%7Dsin%28%5Ctheta%29%7D%7Bg%7D)
We can see that the <u>total time is directly proportional to the angle</u>, then when <u>θ increase t increase.</u>
Therefore letter C is the correct answer.
I hope it helps you!
When you rub a balloon against your hair or clothing, electrons that were previously on the hair/clothing will "jump" onto the balloon. Therefore, the balloon now has a negative charge accumulated on its surface.
When you bring that balloon near another balloon with a neutral charge, they will stick to each other, because the electrons on the surface will be attracted to the positive charges on the other. The positive charges that were previously randomly oriented now line up at the surface. However, after some time, the electrons move around back to their former random positions.