Multiple Choice
Which of the following best describes the difference between potential energy and kinetic energy?
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9. Work & Energy
Intro to Energy & Kinetic Energy
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Which of the following devices is designed to convert energy into mechanical work?
A
Solar panel
B
Battery
C
Electric motor
D
Capacitor
Verified step by step guidance1
Identify the function of each device listed: A solar panel converts solar energy into electrical energy, a battery stores and provides electrical energy, an electric motor converts electrical energy into mechanical work, and a capacitor stores electrical energy temporarily.
Understand the concept of mechanical work: Mechanical work is done when a force is applied to an object, causing it to move. Devices that perform mechanical work convert energy into motion.
Recognize that an electric motor is specifically designed to convert electrical energy into mechanical work by using electromagnetic forces to create motion.
Compare the functions of the devices: While a solar panel, battery, and capacitor deal with electrical energy, only the electric motor is designed to produce mechanical work.
Conclude that the electric motor is the correct answer because it is the device that converts energy into mechanical work, as required by the problem statement.
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