Answer:
Friction is a force that opposes the relative motion or tendency of such motion of two surfaces in contact. While often considered a hindrance, friction serves several useful purposes:
1. **Traction:** Friction provides the necessary traction between tires and road surfaces, enabling vehicles to move safely. Adequate friction is crucial for maintaining control during acceleration, deceleration, and turning, preventing vehicles from sliding or skidding.
2. **Grip and Stability:** In everyday activities, such as walking or running, friction between the shoes and the ground is essential for maintaining stability and preventing slips and falls. The gripping action of friction allows us to navigate various surfaces without losing balance.
3. **Tool Functionality:** Friction enhances the functionality of many tools and devices. For instance, the grip on a screwdriver or the ability to hold objects with our hands relies on friction. Friction is also essential for the operation of brakes in vehicles and machinery, helping to control and stop motion effectively.
