Q:

What is helpful friction?

A:

Quick Answer

Friction is considered helpful during situations such as, but not limited to, preventing slipping between the shoes and the floor during walking, preventing skidding between tires and the road while driving, in brake pads where friction causes the vehicle to stop, and in order to grip things to hold them properly. In all of these cases, friction is important and very beneficial to completing the task at hand.

Know More

Full Answer

Friction is a resistance force that slows down or prevents motion. It occurs due to the interaction between two objects that move relative to each other. These objects can be solid, liquid or gas. Friction is the reason that unlubricated bike chains are harder to push and why devices with moving parts wear out with time. Friction is also the reason why these devices generate heat, like in the brake pads, and why it's possible to start a fire by rubbing two sticks together. Thus, in many cases where friction is trying to be reduced, lubrication is used or the surfaces are made to be as smooth as possible. In other cases where friction is helpful and needs to be increased, rougher surfaces or surfaces made of stickier material, such as rubber, are used.

Learn more about Motion & Mechanics

Related Questions

  • Q:

    What are some friction experiments?

    A:

    UNSW describes an experiment meant to work out the coefficient of static and kinetic friction. The experiment is set up on a table top surface that’s made of vinyl. Two iron disc, each a mass of 1 kg, are placed such that the lowest seats on a sample of artificial turf. To measure the horizontal force needed to overcome friction, a spring balance attached to the masses is pulled.

    Full Answer >
    Filed Under:
  • Q:

    Why is rolling friction much less forceful than sliding friction?

    A:

    When an object slides across the ground, it has much more surface area in direct contact with the ground, which means that the amount of friction is significantly higher. When an object rolls along the ground, only a minuscule point on the object contacts the ground at any point in time, making the stopping force much weaker.

    Full Answer >
    Filed Under:
  • Q:

    What are types of friction?

    A:

    There are four general types of friction: static, kinetic, rolling and fluid. Friction is defined as the force that resists the motion of two objects sliding against each other.

    Full Answer >
    Filed Under:
  • Q:

    What is sliding friction?

    A:

    Sliding or kinetic friction is the drag force that results from two surfaces being pressed against each other while moving in relative motion. The sliding coefficient of friction is the dimensionless factor of this pressing force, resulting in the drag force for two specific surfaces.

    Full Answer >
    Filed Under:

Explore