Question

Find the energy possessed by an object of mass 10 kg when it is at a height of 6 m above the ground. Given, g = 9.8 m s–2

NCERT Class IX
Sciences - Main Course Book

Chapter 11. Work and Energy

Answer 1

the energy possessed by an object of mass 10 kg when it is at a height of 6 m above the ground is only the potential energy which is = (10×9.8×6) J= 588 J

Answer 2

Answer:

Energy (potential energy) possessed by body is 588 J.

Explanation:

Given,

Mass of object = m =  10 kg

Displacement = height reached = h = 6 m

Acceleration due to gravity = g = 9.8 m/s^2

To find: Energy possessed by object.

Solution:

Concept: The energy possessed by body by virtue of its position and configuration is known as Potential Energy.

So, Potential Energy = mass*acceleration*height

or, P.E = mgh

here, m = 10 kg , g = 9.8 m/s^2 , h = 6 m

Substituting the values,

P.E = 10 * 9.8 * 6

or, P.E = 588 J

Therefore, Energy (potential energy) possessed by body is 588 J.