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प्रश्न
Fill in the blanks with suitable words:
When a ball is thrown upwards, ___________ energy is transformed into ___________ energy.
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उत्तर
When a ball is thrown upwards, kinetic energy is transformed into potential energy.
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.
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 running car ____________
What kind of energy is possessed by the following?
Water stored in the reservoir of a dam __________.
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 __________.
Fill in the blank with suitable word :
The sum of the potential and kinetic energies of a body is called __________ energy.
Define the term 'energy' of a body. What is the SI unit of energy.
What is the difference between potential energy and kinetic energy?
Name the device or machine which convert :
Electrical energy into heat energy.
Name the device or machine which convert :
Light energy into electrical energy.
Name the device or machine which convert :
light energy into heat energy.
How much electrical energy in joules does a 100 watt lamp consume : in 1 second?
Five electric fans of 120 watts each are used for 4 hours. Calculate the electrical energy consumed in kilowatt-hours.
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?
Name the energy transfers which occur when someone speaks into a microphone.
A ball falls to the ground as shown below :
What is the potential energy of ball at B?
Which one of the following is not the unit of energy?
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)
