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प्रश्न
Water stored in a dam possesses ______.
विकल्प
no energy
electrical energy
kinetic energy
potential energy
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उत्तर
Water stored in a dam possesses potential energy.
Explanation:
Water stored at a height (in a dam or tank) possesses gravitational potential energy due to its raised position above the ground.
संबंधित प्रश्न
A body falls freely under gravity from rest. Name the kind of energy it will possess while falling.
A metal ball of mass 2 kg is allowed to fall freely from rest from a height of 5 m above the ground. Taking g = 10 m s−2, calculate:
- the potential energy possessed by the ball when it is initially at rest.
- the kinetic energy of the ball just before it hits the ground?
State whether the object possess kinetic energy, potential energy, or both :
A bird running on the ground ____________.
State whether the object possess kinetic energy, potential energy, or both :
A ceiling fan in the off position ______________
What kind of energy is possessed by the following?
A stone kept on roof-top _______________
Fill in the blank with suitable word :
The sum of the potential and kinetic energies of a body is called __________ energy.
A boy weighing 40 kg makes a high jump of 1.5 m.
What is his potential energy at the highest point? (g = 10 m/s2)
Two bodies having equal masses are moving with uniform speeds of v and 2v respectively. Find the ratio of their kinetic energies.
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?
A bulb lights up when connected to a battery. State the energy change which takes place :
The hanging bob of a simple pendulum is displaced to one extreme position B and then released. It swings towards centre position A and then to the other extreme position C. In which position does the bob have :
(i) maximum potential energy?
(ii) maximum kinetic energy?
Explain the transformation of energy in the following cases :
(i) A ball thrown upwards.
(ii) A stone dropped from the roof of a building.
A ball falls to the ground as shown below :
What is the potential energy of ball at B?
Which of the following energy change involves frictional force?
The device which converts mechanical energy into energy which runs our microwave oven is :
In the case of negative work, the angle between the force and displacement is
A body of mass 10 kg falls from a height of 20 m to 8 m. Calculate:
- the loss in potential energy of the body, and
- the total energy possessed by the body at any instant? (Take g = 10 m s-2)
