Physics Quiz on Energy

What are the different types of energy stores? Provide examples for each type.

• Light, sound, and electrical energy

• Fossil fuels, coal, and natural gas energy

• Solar, wind, and hydro energy

• Kinetic, potential, thermal, chemical, and nuclear energy

Explain the concept of gravitational potential energy and give an example of its application in real-life scenarios. How would you explain this to Noah, Emma, and Maya in a way that they can relate to?

• Gravitational potential energy is the energy stored in the bonds between atoms and molecules.

• Gravitational potential energy is the energy produced by nuclear reactions.

• When a roller coaster car is lifted to the top of a hill, it gains gravitational potential energy. This energy can be converted into kinetic energy as the car moves down the hill.

• An example of its application is the energy stored in a hydroelectric dam.

How does the energy transfer process work in a simple pendulum, Ethan, Abigail, and William?

• The pendulum absorbs energy from the surroundings

• The pendulum creates energy through friction

• The pendulum does not involve any energy transfer

• Potential energy is converted to kinetic energy and back as the pendulum swings.

How does the principle of energy conservation apply to a closed system, Liam, Abigail, and Henry?

• The total energy of a closed system remains constant.

• The total energy of a closed system is not affected by any external factors.

• The total energy of a closed system increases over time.

• The total energy of a closed system decreases over time.

How would you explain the concept of energy efficiency and its calculation to Emma, James, and Noah in a fun and engaging way?

• Energy efficiency is calculated by adding the useful output energy and the input energy.

• Energy efficiency is calculated by subtracting the useful output energy from the input energy.

• Energy efficiency is calculated by dividing the useful output energy by the input energy and multiplying by 100 to get a percentage.

• Energy efficiency is calculated by multiplying the useful output energy by the input energy.

Interpret the given Sankey diagram and explain the energy transfers depicted. How would Isla, David, and Oliver describe the energy transfers shown in the Sankey diagram?

• The Sankey diagram depicts the movement of air in a ventilation system

• The energy transfers depicted in the Sankey diagram show the flow of energy from the input source to various output sources, with the width of the arrows representing the amount of energy transferred at each stage.

• The Sankey diagram represents the distribution of population in a city

• The Sankey diagram shows the flow of water in a river

What is the kinetic energy of a 5 kg object moving at a velocity of 10 m/s?

• 250 J

• 500 J

• 100 J

• 50 J

What do Grace, Nora, and Jackson need to know about the relationship between potential energy and kinetic energy in a roller coaster ride?

• Potential energy can be converted into kinetic energy and vice versa

• Potential energy is always greater than kinetic energy

• Kinetic energy can never be converted into potential energy

• Potential energy and kinetic energy are completely unrelated

During a roller coaster ride, what kind of energy transformation takes place?

• from mechanical energy to electrical energy

• from kinetic energy to potential energy only

• from sound energy to light energy

• from potential energy to kinetic energy and vice versa

How does the principle of energy conservation apply to a moving car, Maya, James, and Sophia?

• The car's energy decreases as it moves faster

• The car's energy increases as it moves faster

• The car's energy is not related to its speed

• The total energy of the car, including kinetic energy and potential energy, remains constant as long as no external forces act on the car.