Question

An object of mass 70kg is raised to a height of 70m above the ground.what is its Potential energy

Answer 1

An object of mass 70kg is raised to a height of 70m above the ground.what is its Potential energy

Answer 2

Topic

Energy

Given

An object of mass 70 kg is raised to a height of 70 m above the ground.

To Find

Potential Energy of the object

Concept

Potential Energy

Energy which is possessed by object by virtue of its position.

Potential Energy = Mass × Gravity × Height

SI Unit of Potential Energy is Joules.

Solution

It is given that,

Mass = 70 kg

Gravity ≈ 10 m/s²

Height = 70 metres

Now, apply the formula

Potential Energy = Mass × Gravity × Height

Potential Energy = 70 × 10 × 70 Joules

Potential Energy = 49000 Joules

Potential Energy = 49 kilo Joules

Answer

So, potential energy possessed by the object is 49000 Joules or 49 kJ.

Note : Take care of units.

Unit of mass should be in 'kg', unit of gravity should be in 'm/s²' and unit of height should be in 'metres'.