Physics Energy Conservation

This is the law of...

• Constellations

• Consternation

• Conservation of energy

• Conservation of work

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Energy can only be

• Eaten

• Destroyed

• Created

• Transferred

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Look at the information in the image and choose the correct statement below.

• Fan heater L is more efficient than fan heater M

• Fan heater L has the same efficiency as fan heater M

• Fan heater L is less efficient than fan heater M

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The car in the image is moving along a flat road

Complete the sentence below:

The car is designed to make useful ___________ energy as the car moves

• Light

• Electrical

• Sound

• Kinetic

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During a science experiment, Mia observed that the energy from a battery was used to light up a bulb. Which law states that energy cannot be created or destroyed, only transformed from one form to another?

• Newton's First Law

• Law of Conservation of Energy

• Law of Universal Gravitation

• Law of Thermodynamics

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When a pendulum swings, at which point is kinetic energy highest?

• 1

• 2

• 3

• 4

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The following diagram of a pendulum shows the path it takes as it swings back and forth. As the pendulum moves from point 1 to point 3, what happens to its mechanical energy?

• Potential energy is converted to kinetic energy and back again.

• Kinetic energy is converted to potential energy only once.

• Potential energy is converted to kinetic energy only once

• Kinetic energy is converted to potential energy and back again.

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When a pendulum swings, at which point is potential energy at its greatest? (assume there is no friction)

• 1 and 5

• 2 and 4

• 3 

• 4 and 5

Conservation of energy means that

• energy can be created but not destroyed

• energy can be destroyed but not created

• energy can both be created and destroyed

• energy can neither be created nor destroyed

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Imagine a soccer ball kicked high into the air. At the highest point of its arc, what happens to the kinetic energy of the soccer ball?

• It is at its maximum.

• It is completely converted to potential energy.

• It remains constant throughout the flight.

• It disappears, only to reappear during descent.

Answer explanation

At the highest point of its arc, the kinetic energy of the soccer ball is completely converted to potential energy, as it momentarily stops moving before descending.

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