Sources Of Energy

Question

When a body falls freely to the ground, its velocity reduces to zero and the sum total of kinetic energy and potential energy also becomes zero. Does it violate the law of conservation of energy?

Solution

When a body falls to the ground the law of conservation of energy is not violated. As per the law of conservation of energy, energy can neither be created nor be destroyed.
In this case potential energy and kinetic energy are converted into heat (or light) energy.

Some More Questions From Sources of Energy Chapter

Explain the classification of different sources of energy?

Energy can neither be created nor destroyed. Then why is there so much fuss about energy crisis?

List any four sources of energy which are selected for use for a given activity.

1. Energy to run a cycle
2. Energy to run a car
3. Energy to cook food
4. Energy to work on

Classify the following as renewable and non-renewable sources of energy.
Coal, flowing water, geothermal energy, nuclear energy, biogas, natural gas, petroleum, ocean waves, wood, flowing wind, cooking gas, biomass, hydroelectric power.

'Replenishment of energy source like wood takes a long time but it is considered as renewable source of energy.' Comment.

What constitutes a source of energy?

State the two forms in which energy is mainly utilised at our homes.

What is meant by the transformation of energy? Explain giving an example.

When a body falls freely to the ground, its velocity reduces to zero and the sum total of kinetic energy and potential energy also becomes zero. Does it violate the law of conservation of energy?

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Sources Of Energy

When a body falls freely to the ground, its velocity reduces to zero and the sum total of kinetic energy and potential energy also becomes zero. Does it violate the law of conservation of energy?

Some More Questions From Sources of Energy Chapter

Explain the classification of different sources of energy?

Energy can neither be created nor destroyed. Then why is there so much fuss about energy crisis?

List any four sources of energy which are selected for use for a given activity.

1. Energy to run a cycle
2. Energy to run a car
3. Energy to cook food
4. Energy to work on

Classify the following as renewable and non-renewable sources of energy.
Coal, flowing water, geothermal energy, nuclear energy, biogas, natural gas, petroleum, ocean waves, wood, flowing wind, cooking gas, biomass, hydroelectric power.

'Replenishment of energy source like wood takes a long time but it is considered as renewable source of energy.' Comment.

What constitutes a source of energy?

State the two forms in which energy is mainly utilised at our homes.

What is meant by the transformation of energy? Explain giving an example.

When a body falls freely to the ground, its velocity reduces to zero and the sum total of kinetic energy and potential energy also becomes zero. Does it violate the law of conservation of energy?

Write two advantages of classifying energy sources as renewable and non-renewable.

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For Daily Free Study Material Join wiredfaculty

Sources Of Energy

When a body falls freely to the ground, its velocity reduces to zero and the sum total of kinetic energy and potential energy also becomes zero. Does it violate the law of conservation of energy?

Some More Questions From Sources of Energy Chapter

Explain the classification of different sources of energy?

Energy can neither be created nor destroyed. Then why is there so much fuss about energy crisis?

List any four sources of energy which are selected for use for a given activity. 1. Energy to run a cycle2. Energy to run a car3. Energy to cook food 4. Energy to work on

Classify the following as renewable and non-renewable sources of energy.Coal, flowing water, geothermal energy, nuclear energy, biogas, natural gas, petroleum, ocean waves, wood, flowing wind, cooking gas, biomass, hydroelectric power.

'Replenishment of energy source like wood takes a long time but it is considered as renewable source of energy.' Comment.

What constitutes a source of energy?

State the two forms in which energy is mainly utilised at our homes.

What is meant by the transformation of energy? Explain giving an example.

When a body falls freely to the ground, its velocity reduces to zero and the sum total of kinetic energy and potential energy also becomes zero. Does it violate the law of conservation of energy?

Write two advantages of classifying energy sources as renewable and non-renewable.

Mock Test Series

NCERT Sample Papers

Entrance Exams Preparation

List any four sources of energy which are selected for use for a given activity.

1. Energy to run a cycle
2. Energy to run a car
3. Energy to cook food
4. Energy to work on

Classify the following as renewable and non-renewable sources of energy.
Coal, flowing water, geothermal energy, nuclear energy, biogas, natural gas, petroleum, ocean waves, wood, flowing wind, cooking gas, biomass, hydroelectric power.