Without friction, we wouldn’t be able to walk, run, or drive our cars. On the other hand, friction can also reduce energy efficiency such as the air friction that fights against the motion of vehicles. Consider the good first. In order to move forward, we need to push back on something.

Friction always acts to oppose any relative motion between surfaces. For the simple example of a book resting on a flat table, the frictional force is zero. There is no force trying to move the book across the table, so there is no need for a frictional force because there is nothing for the frictional force to oppose.

When we walk, our feet are pushing backwards and therefore the friction opposes the pushing and acts in the opposite direction which happens to be the direction in which we are walking.

friction

no we cannot work on the frictionless floor because the friction is opposing force that opposes the motion and we use it well. as while walking questions about leg to the ground. because of the friction way didn’t slip while walking. and this friction make stable to walk and stand without slipping.

We would not be able to walk on the surface if there is no friction on the floor. It is the friction which helps us to stand or walk on the surface. The grooves of our feet or shoes are locked into the irregularities of the floor and make us stand.

Without friction, the best way to move would be with rocket propulsion. If there are solid objects on this frictionless surface, it would also be possible to move by pushing off of them.

A: Motion is indeed possible without friction! A usual way to apply a force on an object here on earth is to take advantage of friction, of course, but you can also push and pull on things that have no friction (just make sure the force is applied perpendicular to the surface or your hand will slip).

Friction stops things from sliding apart. If there was no friction everything would slide to the lowest point. It would be impossible to climb up anything. With no friction the only possible movement would be falling to a lower point under gravity.

Walking. Driving a car. Staying in your seat. Operating a mouse and a computer….

• Sneezing and still staying in the same place.
• Belt-pulley drive.
• Ease in normal walking.
• Holding a bottle for drinking water.

Anything you were holding on to, at the moment friction ceased to exist, would instantly fall to the ground or fly out of your hand. If you were walking when friction disappeared, your legs would still work, but you wouldn’t go anywhere.

Without friction, energy transfer would be easier and stopping motion would be more difficult. If there was no friction, there would be no force slowing down motion when two objects rubbed against one another.

Friction can work for or against us. For example, putting sand on an icy sidewalk increases friction so you are less likely to slip. On the other hand, too much friction between moving parts in a car engine can cause the parts to wear out.

Since friction is a resistive force that slows down or prevents motion, it can be a nuisance, because it can hinder motion and cause the need for expending extra energy. Friction can also cause parts in contact to heat up and can cause parts in contact to wear out.

The frictional force between two bodies depends mainly on three factors: (I) the adhesion between body surfaces (ii) roughness of the surface (iii) deformation of bodies.

The nature of the surface (smoothness or roughness) affects the friction. Smooth surfaces have lesser irregularities. The lesser the irregularities, the lesser the tendency to lock. The lesser the tendency to lock with another object, the lesser the friction (that is tendency to oppose motion).

Friction can’t affect mass of a substance(considering for a substance whose mass doesn’t change with time),rather it is the mass of an object which can affect friction variously. Let’s take some example to understand the situation. So,higher the mass of the object,higher will be the frictional force.

Dry friction occurs when two solid objects touch each other. If they are not moving, it is called static friction. If they are moving, it is called kinetic or sliding friction.

Friction between moving engine parts increases their temperature and causes the parts to wear down. Friction can be both harmful and helpful, so it may be necessary to decrease or increase friction.

Friction can be a useful force because it prevents our shoes slipping on the pavement when we walk and stops car tyres skidding on the road. When you walk, friction is caused between the tread on shoes and the ground. This friction acts to grip the ground and prevent sliding. Sometimes we want to reduce friction.

A. One way to reduce friction is to use lubricants. Friction can also be reduced by switching from sliding kinetic friction to rolling kinetic friction. Another way to reduce friction is to make surfaces that rub against each other smoother.