Which force counteracts motion whenever two surfaces come into contact?

Friction is the sneaky little force that steps in to say “not so fast!” whenever two surfaces meet. It's the reason your car can stop when you press the brakes and why you don't go slipping and sliding all over the place when you walk. This force can be both a hero and a villain—helpful when you need grip, but pesky when it slows down the things you want to move quickly! Ever tried to move a heavy box on a wooden floor? That’s friction at play, making your life a bit tougher. But did you know you can use it to your advantage? By using a different surface or applying a bit of lubricant, you can reduce friction and make your movement smoother and more efficient. So next time you encounter a stubborn surface, think creatively—what could you do to smooth things out?