Question

A body of mass 2.5kg is raised 4.0m above the ground.Calculate the potential energy if g=10m/s squared

Answer 1

Answer:

100 joules

Explanation:

$mass = 2.5kg\\height = 4.0\\Acceleration \: due \:to\:gravity = 10m/s^2\\\\P.E = mgh\\P.E = 2.5kg\times10\times4\\\\Potential \: Energy = 100 joules$

Answer 2

The potential energy if g = 10m/s² is 98 J

What is Potential Energy ?

Potential energy is the energy held by an object because of its position relative to other objects, stresses within itself, its electric charge, or other factors.

Formula for potential energy :

P.E. = mgh

• m = mass (kg)
• g = gravity (m/s²)
• h = height/distance (m)

Given :

The book is held from the ground of a distance  = 4.0 m,

so

h = 4.0 m

we know that the book weighs,

2.5 kg

so

m = 2.5 kg.

Now we just put it in the formula  ;

PE = (2.5kg) × (9.8 m/s²) × ( 4.0 m)

P E = 98 J

Therefore, The potential energy if g = 10m/s² is 98 J

Learn more about Potential Energy here ;

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