How does a spur gear make work easier?

A spur gear makes work easier by efficiently transmitting torque and rotational motion between two shafts. Its teeth interlock to provide a firm grip, allowing for smooth and continuous motion without slipping. This mechanical advantage reduces the effort needed to perform tasks, as the gear can increase speed or torque depending on its design. By converting rotational movement, spur gears help in achieving desired output with minimal energy loss.