Question

A 40 kg person walks from the ground to the roof of a 50 m tall building. How much increase in gravitational potential energy is there? (Take g = 10 m/s2)

Answer 1

Answer:

20000J

Explanation:

U = mgh

=40×50×10

20000J

Answer 2

Given :-

• Mass of the body (m)is 40kg
• Height of the body(h) is 50m
• gravity (g) = 10m/s^2

To find :-

• Gravitational potential energy

Solution :-

Here the formula for finding the gravitational potential energy that is ,

U = mgh

where,

• u = gravitational potential energy
• m = mass of the body
• g = gravity
• h = height of the body

Plugging down the values ,

U = (40)(10)(50)

U = 400(50)

U = 20,000 J

So, the gravitational potential energy of the body is 20,00 J

Know more about  Gravitational potential energy :-

It is defined as the energy stored in an object due to its height is called Gravitational potential energy

• S.I unit  is Joule

The gravitational potential energy is always zero in the ground

Know more formulae :-

W = Force * displacement

K.E = 1/2 mv²

• m = mass
• v = velocity
• K.E = kinetic energy

U= 1/2kx²

• U = Elastic potential energy
• k = spring constant
• x = compression

Work done may be the Kinetic energy, potential energy , elastic potential energy , gravitational energy etc