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प्रश्न
What kind of energy is possessed by the following?
A stone kept on roof-top _______________
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उत्तर
A stone kept on a roof possesses gravitational potential energy because of its height from the ground.
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संबंधित प्रश्न
State the condition under which the mechanical energy is conserved.
Show that the sum of kinetic energy and potential energy (i.e., total mechanical energy) is always conserved in the case of a freely falling body under gravity (with air resistance neglected) from a height h by finding it when
- The body is at the top.
- the body has fallen a distance x.
- the body has reached the ground.
Is energy a vector quantity?
What are the various forms of energy?
Name the device or machine which convert :
Mechanical energy into electrical energy.
Name the device or machine which convert :
Chemical energy into electrical energy.
Name the device or machine which convert :
Chemical energy into kinetic energy (or mechanical energy).
Which one of the following is not the unit of energy?
Which of the following energy change involves frictional force?
A body of mass 10 kg at rest is acted upon simultaneously by two forces 4 N and 3 N at right angles to each other. The kinetic energy of the body at the end of 10 s is
