Energy, Work and Power

Mr. Anderson explains energy, work, and power. Energy is the ability to do work, which is force times distance, measured in joules. He uses a can of Coke to illustrate work, showing that moving it up stairs involves 12 joules of work. Power, the rate of doing work, is measured in watts. He explains that moving the Coke in one second equals 12 watts, while doing it in 10 seconds equals 1.2 watts. Horsepower, used in engines, is about 746 watts. The video concludes by noting that moving the Coke also involves moving one's body weight, indicating more power than calculated.

Which of the following is NOT considered a form of energy?

• Chemical bonds

• Sound

• Gravity

• Electricity

How is work defined in scientific terms?

• Force times distance

• Force divided by distance

• Energy times time

• Energy divided by time

If a can of Coke weighing 4.0 newtons is moved up 3.0 meters, how much work is done?

• 7 joules

• 12 joules

• 15 joules

• 9 joules

What is the unit of power in the International System of Units?

• Horsepower

• Watt

• Newton

• Joule

How many watts are approximately equivalent to one horsepower?

• 500 watts

• 1000 watts

• 1500 watts

• 746 watts