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 = $\sf\dfrac{20}{1000}$

$\longrightarrow\:$ = 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 = $\bf\pink{0.4\:joules}$