definitions and meaning of friction, rolling friction,static and kinetic friction
Answers
Answer:
Friction is defined as the force that opposes the motion of a solid object over another. There are mainly four types of friction: static friction, sliding friction, rolling friction, and fluid friction. Friction and normal force are directly proportional to the contacting surfaces and it doesn’t depend on the hardness of the contacting surface. With the increase in relative speeds, the sliding friction reduces whereas fluid friction increases with the increase in the relative speed, also fluid friction is dependent on the viscosity of the fluid.
What Is Rolling Friction?
Rolling friction is defined as the force which resists the motion of a ball or wheel and is the weakest types of friction.
Examples Of Rolling Friction
Following are the examples of rolling friction:
Rolling of the log on the ground
Wheels of the moving vehicles
Static Friction
Static friction acts on objects when they are resting on a surface. For example, if you are hiking in the woods, there is static friction between your shoes and the trail each time you put down your foot (see Figure below). Without this static friction, your feet would slip out from under you, making it difficult to walk. In fact, that's exactly what happens if you try to walk on ice. That's because ice is very slippery and offers very little friction.