Principles of Energy and Energy Transfers

The video tutorial explains various energy stores, including kinetic, gravitational potential, elastic potential, thermal, chemical, electrical, and internal energy. It discusses how energy is transferred and transformed when systems change, using examples like a wind turbine, a ball being thrown, a car braking, boiling water, and hitting metal with a hammer. The tutorial emphasizes that energy is not lost but converted into different forms, highlighting the principles of energy conservation.

What type of energy is stored in an object due to its motion?

• Gravitational potential energy

• Elastic potential energy

• Kinetic energy

• Chemical energy

Which energy type is associated with the position of an object in a gravitational field?

• Thermal energy

• Chemical energy

• Gravitational potential energy

• Electrical energy

When a system changes, what happens to the energy within it?

• It is destroyed

• It increases indefinitely

• It remains constant

• It is transferred to other energy types or stores

What happens to the kinetic energy of a ball as it reaches its maximum height?

• It remains constant

• It is converted to gravitational potential energy

• It increases

• It disappears

When a car brakes, what happens to its kinetic energy?

• It is converted to internal energy

• It remains as kinetic energy

• It is lost

• It is stored as chemical energy

What is the result of repeatedly hitting a piece of metal with a hammer?

• The metal cools down

• The metal becomes electrically charged

• The metal's internal energy decreases

• The metal's temperature increases

In the process of boiling water in a kettle, what type of energy is primarily transferred to the water?

• Chemical energy

• Gravitational potential energy

• Kinetic energy

• Thermal energy