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प्रश्न
What kind of energy is possessed by the following?
A running car ____________
What kind of energy is possessed by the following?
A moving car
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उत्तर
Kinetic 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.
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.
State whether the object possess kinetic energy, potential energy, or both :
A ceiling fan in the off position ______________
State whether the object possess kinetic energy, potential energy, or both :
A stretched spring lying on the ground ____________.
A boy weighing 40 kg makes a high jump of 1.5 m.
What is his kinetic energy at the highest point?
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)
Define the term 'energy' of a body. What is the SI unit of energy.
A ball of mass 0.5 kg slows down from a speed of 5 m/s so that of 3 m/s. Calculate the change in kinetic energy of the ball. State your answer giving proper units.
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 :
Electrical energy into light energy.
How much electrical energy in joules does a 100 watt lamp consume : in 1 second?
Name the energy transfers which occur when an electric ball rings.
Name the energy transfers which occur when there is a picture on a television screen.
Name the energy transfers which occur when a torch is on.
When an object falls freely towards the earth, then its total energy :
Which of the following energy change involves frictional force?
The device which converts mechanical energy into energy which runs our microwave oven 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)
