1.2.1 Principle of Conservation of Energy

• A falling object converts kinetic energy to gravitational potential energy as it rises.

  False
• Match the mechanical system with its energy transformations:

  Pendulum ↔️ Kinetic to gravitational potential

  Bouncing Ball ↔️ Kinetic to elastic potential

  Roller Coaster ↔️ Gravitational to kinetic
• A closed system is isolated from its surroundings
• An open system allows energy to flow in and out of it.

  True
• Steps in the principle of conservation of energy

  1️⃣ Energy cannot be created

  2️⃣ Energy cannot be destroyed

  3️⃣ Energy can only be transformed

  4️⃣ Total energy in a closed system remains constant
• Match the mechanical system with its energy transformation:

  Pendulum ↔️ Kinetic to gravitational potential energy

  Bouncing Ball ↔️ Kinetic to elastic potential energy
• A closed system is isolated from its surroundings and conserves energy internally.


  True
• What happens to the total energy in a closed system if no energy is exchanged with the surroundings?

  It remains constant
• When lifting a book, you give it gravitational potential energy
• In a closed system, energy is conserved within the system
• What is a closed system in terms of energy exchange?

  No energy exchange
• Match the system type with its characteristic:

  Open System ↔️ Energy can flow in and out

  Closed System ↔️ Energy is conserved within the system
• Energy can be transformed into forms such as kinetic, potential, thermal, and electrical
• What type of energy is gained when you lift a book?

  Gravitational potential energy
• What type of energy does a roller coaster gain as it climbs uphill?

  Gravitational potential energy
• Match the mechanical system with its energy transformation:

  Pendulum ↔️ Kinetic to gravitational potential

  Bouncing Ball ↔️ Gravitational potential to elastic potential
• Match the system type with its example:

  Open System ↔️ Car engine

  Closed System ↔️ Sealed thermos
• Energy can only be transformed into kinetic, potential, thermal, and electrical forms.


  True
• The principle of conservation of energy states that energy cannot be created or destroyed
• The total energy in a closed system remains constant during energy transformations.

  True
• An open system allows energy to flow in and out of the system.


  True
• In a closed system, energy is conserved
• What is an example of a closed system mentioned in the material?

  Pendulum
• A falling object demonstrates the conversion of kinetic energy to gravitational potential energy.

  True
• In mechanical systems, energy is transformed between kinetic and potential
• In mechanical systems, energy transformations demonstrate the principle of conservation of energy
• What happens to the total energy of a system when a roller coaster descends a hill?

  It remains constant
• Energy is neither created nor destroyed, but transformed