A machine is a device that uses energy to perform work. Machines can be simple or complex and are designed to make tasks easier or more efficient by modifying force, motion, or energy.

Key characteristics of a machine include:

• Energy Conversion: Machines convert one form of energy into another to perform work. For example, an internal combustion engine converts chemical energy (fuel) into mechanical energy (motion).
• Force Multiplication or Modification: Machines can multiply a force (like a lever) or change its direction.
• Controlled Motion: They provide controlled and directed motion.
• Automation: Many machines are designed to automate tasks, reducing the need for human intervention.

For a more detailed understanding, you might find the following resources helpful:

• Britannica - Machine
• Explain that Stuff - Simple Machines