Question

What are some of the most common examples of helpful friction?

Answer 1

Hint: Friction is the force that prevents solid surfaces, fluid layers, and material elements from sliding against each other from moving in the same direction.Friction provides traction that is needed to walk without slipping. Friction is useful in most cases, however, they also provide a great measure of opposition to the motion.

Complete answer:
We shall explain some of the most common examples of helpful friction.
Walking: Walking is only possible when frictional force is applied. Friction is what keeps the shoe from slipping on the ground. The lack of friction on the ice is one of the reasons that walking on the icy surface of the ice is difficult.

Writing: When the pen's tip comes into contact with the paper's surface, a frictional force is produced. When writing with a ballpoint pen, rolling friction is present, while when writing with a pencil, sliding friction is present.

Lighting a matchstick: Heat is produced when the matchstick's head is rubbed against a rough surface, and this heat transforms red phosphorus to white phosphorus. The matchstick ignites because white phosphorus is extremely flammable. Owing to the presence of water, matchsticks may also fail to fire. Water helps to reduce friction.

Driving a car on a surface: The engine produces a force on the driving wheels when pushing a vehicle. The car begins to move forward as a result of this force. The force that prevents the tyre rubber from slipping on the ground surface is known as friction. Vehicles do not skid as a result of this friction.

Breaks used to stop a vehicle: Friction braking is the most commonly used braking technique in automobiles. The transfer of kinetic energy to thermal energy occurs as friction is applied to a vehicle's moving parts. The friction force opposes the motion and induces heat as a result. This energy transfer gradually reduces the velocity to zero.

Note: Friction generates excessive heat, resulting in energy loss. Friction reduces the speed of moving objects when it moves in the opposite direction of motion. Forest fires are started due to the friction between tree branches.