Question

An object of mass 20g taken at a height of 2m above the ground. Which type of energy is possessed by the object at this height ? Calculate the value of this energy?​​

Answer 1

Given

• Mass of an object is
  `\bf\red{20 g}`
• Height of the body is
  `\bf\green{2 m}`

To Find

• Value of the energy

Solution

`{\purple {\underline{\boxed{\sf{ Potential\: Energy \:=\: mgh}}}}}`

Where,

• 
  `\sf\red{m}` = Mass
• 
  `\sf\green{g}` = Gravity
• 
  `\sf\blue{h}` = Height

Now, Converting gram to kg

`\longrightarrow\:` 1000g = 1kg

`\longrightarrow\:` 20g =
`\sf(20)/(1000)`

`\longrightarrow\:` = 0.02 kg

According to the question

`\sf\red{Mass \:= \:0.02 kg}`

`\sf\green{Gravitational \;force \:= \;10 m/s^(2)}`

`\sf\purple{Height\: =\: 2 m}`

Putting these values

`\to\:` Potential Energy = mgh

`\to\:` Potential Energy = 0.02 × 10 × 2

`\to\:` Potential Energy = 0.2 × 2

`\to\:` Potential Energy =
`\bf\pink{0.4\:joules}`