Question

A body of mass 50 kg raised to the height 3m.what is potential energy ?

Answer 1

Provided that:

• A body of mass 50 kg raised to the height 3 m. What is potential energy ?

According to statement:

• Mass = 50 kg
• Height = 3 m

To calculate:

• Potential energy

Solution:

• Potential energy = 1470 Joules

Using concept:

• Potential energy formula

Using formula:

• ${\sf{E_p \: = mgh}}$

(Where, E_p denotes potential energy, m denotes mass of body, g denotes acceleration due to gravity, h denotes height)

Knowledge required:

• Acceleration due to the gravity, g = 9.8 metre per second sq.

Required solution:

→ ${\sf{E_p \: = mgh}}$

→ ${\sf{E_p \: = 50(9.8)(3)}}$

→ ${\sf{E_p \: = 50 \times 9.8 \times 3}}$

→ ${\sf{E_p \: = 150 \times 9.8}}$

→ ${\sf{E_p \: = 1470 \: J}}$

Therefore, potential energy is equal to 1470 Joules

Additional information:

➜ Potential energy = The capacity of doing work developed in a body due to it's position or configuration is known as potential energy like, ⑴ energy of stretched or compressed string ⑵ energy of spring in a watch ⑶ energy of water collected at a height.

PE of a body is the gravitational field of earth is ${\sf{mgh}}$

(Where, m denotes mass , g denotes acceleration due to gravity and h denotes height of the body from the surface of the earth)

• In easy words,

➜ Potential energy = It is that energy when an object increase its energy when raised to a height. That's because work done on it is against gravity while it is being raised. Such type of energy is known as potential energy.

Answer 2

Given:-

Mass=m=50kg

Height=h=3m

Gravitational Force=g=10m/s$^2$

To find:-

• Potential Energy=P.E

Solution:-

We know that

$\boxed{\sf P.E=mgh}$

$\\ \tt{:}\longrightarrow P.E=50\times 10\times 3$

$\\ \tt{:}\longrightarrow P.E=500\times 3$

$\\ \tt{:}\longrightarrow P.E=1500Joules$