Which statement describes a simple machine?

Which statement describes a simple machine?

• A. A device that makes work easier by changing the size or direction of a force.
• B. It is any device that stores energy.
• C. It converts heat into electricity.
• D. It increases the speed of motion without energy transfer.

Answer: (A)

Simple machines are devices that make work easier by changing the size or direction of a force. They don’t create energy; they provide a mechanical advantage, letting you apply less effort or direct your force more effectively. The statement describes exactly that idea, identifying a device that makes work easier by altering how big your force is or the direction in which you apply it. Other descriptions refer to storing energy, converting heat into electricity, or increasing speed without energy transfer, which aren’t about how simple machines operate. Common simple machines include levers, inclined planes, pulleys, screws, wedges, and wheels with axles.

Simple machines are devices that make work easier by changing the size or direction of a force. They don’t create energy; they provide a mechanical advantage, letting you apply less effort or direct your force more effectively. The statement describes exactly that idea, identifying a device that makes work easier by altering how big your force is or the direction in which you apply it. Other descriptions refer to storing energy, converting heat into electricity, or increasing speed without energy transfer, which aren’t about how simple machines operate. Common simple machines include levers, inclined planes, pulleys, screws, wedges, and wheels with axles.