Calculate the potential energy of a rock with a mass of 5 kg while sitting on a cliff that is 30 m high

solution.

given,

mass= 5kg

height= 30m

acceleration =9.8m/s^2 or 10m/s^2

P.E=mgh

=5×30×10

=1500 joule.

as we know our atmosphere or air have different levels. every level has other gasses, and every gas has another permeability. when the light comes from lower permeability to higher permeability, it changes its direction. so that means that when the light comes from the moon to the earth, it changes it's direction many more times. it basically means that the shape of the light part of the moon is changed on the earth.

hope this ! this is not copied! search it up, it's free of plagiarism!

+15-35=-20

going in opposite directions