The weight of a large steel ball is 14700 newton’s. what power is used in raising this steel ball to a height of 30 meters if the work is performed in 30 seconds?

W = weight of steel ball = 14700 N

m = mass of steel ball =

h = height raised = 30 m

Potential energy gained is given as

U = mgh

U = 1500 x 9.8 x 30

U = 441000 J

t = time taken = 30 sec

P = power used

Power is given as

P =

inserting the values

P =

P = 14700 Watt

this one:

as we gain mass the force of gravity on us increases.

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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.

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