Which statement best describes simple machines?

Which statement best describes simple machines?

• A. They are the smaller mechanisms that make up all larger machines, and they can change the direction or magnitude of a force
• B. They are devices that generate energy
• C. They are only used to measure weight
• D. They cannot alter force

Answer: (A)

Simple machines are the basic devices that make work easier by changing how a force is applied. They’re the building blocks of all larger machines, and using one or more of them lets you change either the direction of a force or how strong the force needs to be (mechanical advantage). For example, a lever or pulley lets you lift a load with less effort or redirect your pull to where you’re pulling from. They don’t generate energy themselves, and they aren’t only used to measure weight. This combination of being foundational building blocks and enabling you to alter force or its direction makes the statement the best description of simple machines.

Simple machines are the basic devices that make work easier by changing how a force is applied. They’re the building blocks of all larger machines, and using one or more of them lets you change either the direction of a force or how strong the force needs to be (mechanical advantage). For example, a lever or pulley lets you lift a load with less effort or redirect your pull to where you’re pulling from. They don’t generate energy themselves, and they aren’t only used to measure weight. This combination of being foundational building blocks and enabling you to alter force or its direction makes the statement the best description of simple machines.