10th Class Physics Notes for Pdf Download chapter #8 work power and energy for Sindh Karachi all boards short long question and MCQs.
Does a hydrogen-filled balloon possess any potential energy?
Yes, a hydrogen-filled balloon possesses potential energy because hydrogen gas is lighter than air and light gases move in the upward direction against gravity. So, a hydrogen-filled balloon will move in the upward direction and will get higher. So, this balloon will have potential energy.
What is energy, name the different forms of energy?
Whenever work is done on an object, it gains energy. The energy of a body is its capacity for doing work.
Thus energy and work are the same and both are measured in the same units.
Whenever we do work on a body, we store in it an amount of energy equal to work done.
There are two forms of energy, such as:
i) KINETIC ENERGY:
When a body is capable of doing work by virtue of its motion, the energy is called kinetic energy or the energy associated with a mass due to its motion is called kinetic energy.
ii) POTENTIAL ENERGY:
When a body is capable of doing work by virtue of its position, or special configuration the energy is called potential energy.
There are different kinds of potential energy such as:
1) GRAVITATIONAL P.E:
The energy associated with a mass when lifted to a height in the earth’s gravitational field is called gravitational potential energy.
2) ELASTIC POTENTIAL ENERGY:
The energy stored in a stretched or compressed elastic material such as a spring is called elastic potential energy.
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