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प्रश्न
A ball falls to the ground as shown below :
Which law you have made use of in answering this question?
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उत्तर
Law of conservation of energy is used in answering these questions.
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संबंधित प्रश्न
A ball is placed on a compressed spring. What form of energy does the spring possess? On releasing the spring, the ball flies away. Give a reason.
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.
What kind of energy is possessed by the following?
A running car ____________
Fill in the blank with suitable word :
The ability of a body to do work is called __________. The ability of a body to do work because of its motion is called __________.
Give two examples where a body possesses both, kinetic energy as well as potential energy.
What are the various forms of energy?
Name the device or machine which convert :
Electrical energy into heat energy.
How much electric energy in kWh is consumed by an electrical appliance of 1000 watts when it is switched on for 60 minutes?
A ball falls to the ground as shown below :
What is the kinetic energy of ball when it hits the ground?
Which one of the following is not the unit of energy?
