Friction is a force that opposes motion between two surfaces in contact. It is often seen as a nuisance, causing wear and tear on objects. However, friction is crucial for many everyday activities. Here are two examples:
1. Walking
Walking is impossible without friction. When you take a step, your foot pushes backward against the ground. This force creates friction, which in turn pushes you forward. Without friction, your foot would simply slide along the ground, and you wouldn't be able to move.
2. Driving a Car
Cars rely on friction to start, stop, and turn. The tires of a car grip the road due to friction, allowing the car to accelerate and decelerate. Friction also allows the car to turn, as the tires grip the road and prevent the car from sliding.
