Which of the following is a simple machine?

Which of the following is a simple machine?

• A. Inclined Plane
• B. Lever
• C. Computer
• D. Engine

Answer: (B)

A simple machine is a device that makes work easier by changing the size or direction of a force. A lever is a classic example: a rigid bar that pivots around a fixed point called a fulcrum. When you push down on one end, you can lift a heavier load on the other end with less effort because the lever lets you trade distance moved for force. This direct demonstration of multiplying or redirecting force makes the lever the clearest choice among the options. The computer and the engine are complex systems, not single simple machines. The inclined plane is also a simple machine, but the lever is the most straightforward example shown here.

A simple machine is a device that makes work easier by changing the size or direction of a force. A lever is a classic example: a rigid bar that pivots around a fixed point called a fulcrum. When you push down on one end, you can lift a heavier load on the other end with less effort because the lever lets you trade distance moved for force. This direct demonstration of multiplying or redirecting force makes the lever the clearest choice among the options. The computer and the engine are complex systems, not single simple machines. The inclined plane is also a simple machine, but the lever is the most straightforward example shown here.