In a fresh water lake
atmosphere
earths mantle
<h3><u>Given</u> </h3>
- Mass of an object is

- Height of the body is

<h3><u>To Find</u></h3>
<h3><u>Solution</u></h3>

Where,
= Mass
= Gravity
= Height
Now, Converting gram to kg
1000g = 1kg
20g = 
= 0.02 kg
According to the question



Putting these values
Potential Energy = mgh
Potential Energy = 0.02 × 10 × 2
Potential Energy = 0.2 × 2
Potential Energy = 
centre of square disrance to each corner found by Pythagoras' theorem.
coulombs law used to clculate field of each charge at centre
fields added vectorially for res
C.) The rougher the surface of an object, the more friction it will produce.
think of sliding a rock on the street