ENERGY & ENERGY TRANSFORMATIONS

What is the law of conservation of energy?

• Energy can be created and destroyed.

• Energy can only be transformed from one form to another.

• Energy is a constant that does not change.

• Energy can be transferred but not transformed.

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What is energy?

• Energy is the ability to do work or cause change.

• Energy is a measure of temperature.

• Energy is the amount of matter in an object.

• Energy is the force exerted by an object in motion.

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What is the relationship between height and gravitational potential energy?

• Gravitational potential energy decreases with height; the higher an object is, the less potential energy it has.

• Gravitational potential energy remains constant regardless of height.

• Gravitational potential energy increases with height; the higher an object is, the more potential energy it has.

• Gravitational potential energy is only dependent on the mass of the object, not its height.

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What is the difference between potential energy and kinetic energy?

• Potential energy is energy due to position, while kinetic energy is energy due to motion.

• Potential energy is energy due to motion, while kinetic energy is energy due to position.

• Potential energy is the energy stored in an object, while kinetic energy is the energy of an object at rest.

• Potential energy and kinetic energy are the same and can be used interchangeably.

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What is an example of energy transformation in a car?

• Chemical energy from fuel is transformed into kinetic energy as the car moves.

• Kinetic energy is transformed into potential energy when the car is parked on a hill.

• Electrical energy from the battery is transformed into thermal energy in the engine.

• Mechanical energy is transformed into sound energy when the car honks.

What is elastic potential energy?

• The energy stored in elastic materials as a result of their stretching or compressing, such as in a rubber band.

• The energy produced by moving objects due to their velocity.

• The energy released when a chemical reaction occurs.

• The energy associated with the position of an object in a gravitational field.

What is thermal energy?

• The energy stored in chemical bonds of a substance.

• The total kinetic energy of particles in a substance, which is related to its temperature.

• The energy produced by electrical currents in a conductor.

• The energy associated with the motion of an object in a gravitational field.

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What is an example of thermal energy in everyday life?

• The heat produced by a stove when cooking food.

• The light emitted by a lamp.

• The sound produced by a radio.

• The movement of a car on the road.

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What happens to the potential energy of an object as it falls?

• It remains constant throughout the fall.

• It increases as the object falls.

• It decreases while its kinetic energy increases.

• It becomes zero when it reaches the ground.

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How does energy transform in a light bulb?

• Electrical energy is transformed into kinetic energy and sound energy.

• Electrical energy is transformed into thermal energy and light energy.

• Electrical energy is transformed into chemical energy and potential energy.

• Electrical energy is transformed into magnetic energy and gravitational energy.