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Explain the following: (a) An object …

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Explain the following: (a) An object increases its energy when raised through a height. (b) Energy is neither created nor destroyed then from where dowe get energy. (c) When we push the wall, the wall does not move and no work is done.

Posted by Aryan Kumar 5 years, 10 months ago

CBSE > Class 09 > Science

2 answers

Ashlesh Kumar 5 years, 10 months ago

The answer for c- accordind to science Work/work done -force ×diplacement Work will only be done when an object is displaced and force is applied to it. W =f ×s That is why when we push a wall by applying force, we actually do not do work as the wall /object is not diaplaced and remains stationary..

Ashlesh Kumar 5 years, 10 months ago

The answer for A- this phenomenon is potential energy at height when the object is raised to a height then kinetic energy is 0 and potential energy (assumption/ let's keep it) will be 800 and it will remain same till the object reaches it's upmost point then the kinetic energy will start increasing and the potential energy will decrease uniformly. You should also note that the sum of kinetic energy +potential energy will remain to be same. For more doubts please refer ncert activities

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