3F - 4. Mechanical Energy

What is the unit of measurement for mechanical work?

• Pascals

• Newtons

• Joules

• Watts

What does the formula W = F × s represent?

• Kinetic energy

• Work done

• Potential energy

• Power

What type of energy is associated with the motion of an object?

• Thermal energy

• Chemical energy

• Kinetic energy

• Potential energy

Which of the following is NOT a pathway for energy transfer?

• By heating

• Chemically

• Electrically

• Mechanically

What does the law of conservation of energy state?

• Energy can be created and destroyed

• Energy can only be stored

• Energy can be transferred but not created or destroyed

• Energy is always lost in transfers

What is the efficiency of an engine that does 30 J of useful work for every 100 J of energy supplied?

• 70%

• 10%

• 50%

• 30%

What is the SI unit of power?

• Newton

• Joule

• Ampere

• Watt

Which of the following is a renewable energy source?

• Nuclear

• Coal

• Natural gas

• Wind

What is a major environmental concern with fossil fuels?

• They are too expensive

• They produce carbon dioxide

• They are renewable

• They are easy to transport

What type of energy is produced when a river fills a lake behind a dam?

• Nuclear energy

• Hydroelectric energy

• Wind energy

• Solar energy