Question

A body of mass 20kg is placed at a height of 40m from earth. calculate the potential energy possed by the body​

Answer 1

Given

A body of mass 20 kg is placed at a height of 40 m from earth

To Find

Potential Energy

Solution

We know that

$\sf \longrightarrow PE=mgh$

Here

• PE = Potential Energy
• m = Mass
• g = Acceleration of gravity
• h = Height

According to the question

We are asked to find potential energy

Therefore

We must find "PE"

Given that

A body of mass 20 kg is placed at a height of 40 m from earth

Hence

• m = 20 kg
• h = 40 m

We know that

• g = 10 m/s²

Substituting the values

We get

$\sf \longrightarrow PE=20 \times 10 \times 40 \ J$

Therefore

$\sf \longrightarrow PE=8000 \ J$

Hence

Potential Energy = 8000 J

Answer 2

Answer:

Given :-

• A body of mass 20 kg is placed at a height of 40 m from the earth.

To Find :-

• What is the potential energy possed by the body.

Formula Used :-

$\boxed{\bold{\large{Potential\: Energy\: =\: mgh}}}$

where,

• m = mass
• g = Acceleration due to gravity (10 m/s²)
• h = height

Solution :-

Given :

• mass = 20 kg
• height = 40 m

According to the question by using the formula we get,

↦ P.E = 20 × 10 × 40

↦ P.E = 200 × 40

➠ P.E = 8000 J

$\therefore$ The potential energy of the body is 8000 J .

✭ Extra Information ✭

• Potential energy is defined as the amount of work done in moving unit positive charge from one point to another.
• The unit of potential energy is volt.
• 1 volt = 1 Joule/Coloumb .