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प्रश्न
Give two examples where a body possesses both, kinetic energy as well as potential energy.
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उत्तर
Two examples in which the body possesses kinetic energy as well as potential energy are-
(i) A man climbing a hill
(ii) A bird flying in the sky
In both of the above examples, we can observe that the body has speed and its position is above the ground. Therefore, these bodies have kinetic and potential energy.
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संबंधित प्रश्न
A stone of mass 500 g is thrown vertically upwards with a velocity of 15 m/s. Calculate:
- the potential energy at the greatest height,
- the kinetic energy on reaching the ground, and
- the total energy at its half-way point.
State whether the object possess kinetic energy, potential energy, or both :
A man climbing a hill _____________.
Define the term 'energy' of a body. What is the SI unit of energy.
Two bodies having equal masses are moving with uniform speeds of v and 2v respectively. Find the ratio of their kinetic energies.
What is the difference between potential energy and kinetic energy?
A stone is thrown upwards as shown in the diagram. When it reaches P, which of the following has the greatest value of the stone?
Name the device or machine which convert :
Mechanical energy into electrical energy.
What kind of energy transformation take place at a hydroelectric power station?
A bulb lights up when connected to a battery. State the energy change which takes place :
Name the energy transfers which occur when there is a picture on a television screen.
