The potential energy is nbsp-least when you are -sitting on a chair-sleeping on the ground-standing on the ground-sitting on the ground-

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Standard VIII

Physics

Conversion of P.E to K.E

The potential...

Question

The potential energy is least when you are ___.

sitting on a chair

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sitting on the ground

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sleeping on the ground

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standing on the ground

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Solution

The correct option is C
sleeping on the ground

The potential energy of an object is the energy possessed by the object by virtue of its position.
Potential energy, PE = mgh,
where m is the mass of the object, g is the acceleration due to gravity and h is the height to which the object is raised.
Now, in the case of a human body, the height of the body from the ground is measured from the centre of mass of the body. So the potential energy will be least in case of a person who is sleeping because in that situation height of the centre of mass of the body will be minimum from the ground.

Suggest Corrections

Similar questions

Rewrite the following sentences using proper alternative.

a. The potential energy of your body is least when you are .....

(i) sitting on a chair
(ii) sitting on the ground
(iii) sleeping on the ground
(iv) standing on the ground

b. The total energy of an object falling freely towards the ground ...

(i) decreases
(ii) remains unchanged

(iii) increases
(iv) increases in the beginning and then decreases

c. If we increase the velocity of a car moving on a flat surface to four times its original speed, its potential energy ....

(i) will be twice its original energy

(ii) will not change
(iii) will be 4 times its original energy
(iv) will be 16 times its original energy.

d. The work done on an object does not depend on ....

(i) displacement
(ii) applied force
(iii) initial velocity of the object
(iv) the angle between force and displacement.

When is the pressure on ground more: when a man is standing or when a man is sitting on a chair

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10 m s^{- 2}

)

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