Question

the potential energy of a body at height h is x joules when it reaches to the ground its potential energy will become​

Answer 1

When the body will reach to the ground its P.E will be 0.

Explanation:

here,

P.E = mgh = x

when h is at ground it will be 0.

So, P.E =m*g*0 =x

P.E = 0.

Answer 2

Potential energy will be zero.

Explanation:

Given:

Height from ground = h .

Potential energy of body at h is = x.

We know ,

Potential energy of an object of mass m and height h is given by , $P=m\times g\times h$. ( here h is distance of object from the ground)

So, for an object placed on the ground.

Therefore, $h=0$ .

Putting h in above equation ,

We get, $P=0$ .

Therefore, for any object which is placed on ground regardless of its mass its potential energy will always be zero.

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Potential energy.

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