Is force visible?

The force itself is never visible. It is the signs, traces, and remains of it, that produce visible marks, from which we draw conclusions and imagine the force behind it.

What are some visible forces?

The forces controlling the world, and by extension, the visible universe, are gravity, electromagnetism, weak nuclear forces, and strong nuclear forces.

Is friction a force?

Friction is a force between two surfaces that are sliding, or trying to slide, across each other. For example, when you try to push a book along the floor, friction makes this difficult. Friction always works in the direction opposite to the direction in which the object is moving, or trying to move.

What is the weakest type of friction?

Rolling friction is defined as the force which resists the motion of a ball or wheel and is the weakest types of friction.

What is easier rolling or sliding?

When an object rolls over the surface of another object ,the resistance to its motion is called rolling friction. It is always easier to roll than to slide an object over another object.So rolling friction is much less than the sliding friction.

Is friction an advantage or disadvantage?

Advantage:Friction is help use to move one place to another place . Disadvantage:when the friction come on walking and running they work on the sole of shoes and the a sole of shoes is decreased by running and walking so, it is costly. Advantages of friction : Friction helps us to walk on the ground.

What are disadvantages of friction 8?

Disadvantages of Friction:

Friction produces unnecessary heat leading to the wastage of energy.
The force of friction acts in the opposite direction of motion, so friction slows down the motion of moving objects.
Forest fires are caused due to the friction between tree branches.

What are 3 ways you can reduce friction?

Methods for decreasing friction:

Make the surfaces smoother. Rough surfaces produce more friction and smooth surfaces reduce friction.
Lubrication is another way to make a surface smoother.
Make the object more streamlined.
Reduce the forces acting on the surfaces.
Reduce the contact between the surfaces.

Why is friction not useful?

Friction can also be unhelpful. If you do not lubricate your bike regularly with oil, the friction in the chain and axles increases. Your bike will be noisy and difficult to pedal. When there is a lot of friction between moving parts, energy is transferred to the surroundings, causing heating.

What are the disadvantages of friction in our daily life?

Three disadvantages of friction are :

Friction produces heat which damages the moving parts of a machine.
Friction produces wear and tear on the contacting surfaces. This reduces the life of machine parts, tyres and shoe soles.
A lot of energy is wasted in overcoming the friction before an object starts moving.

Why is friction evil?

Frictional force causes a lot of losses in general upkeep and wear and tear of machinery. Hence it is considered as a evil. But almost all crucial tasks cannot be carried out without the presence of friction. Hence it is considered as a necessary evil .

What gives friction a bad reputation?

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.

How we can reduce friction?

By polishing the surface, as polishing makes the surface smooth and friction can be reduced. Using lubricants such as oil or grease can reduce the friction between the surfaces. When objects are rolled over the surface, the friction between the rolled object and surface can be reduced by using ball bearings.

Can water reduce friction?

Water can either increase or decrease the friction between two surfaces. Water reduces the friction between rubber tires and road pavements. That’s why drivers have to be extra careful not to skid when roads are wet. Water can increase the friction between your fingers and a sheet of plastic.

Is sand can reduce friction?

Sliding Sand Adding a small amount of water to sand can significantly reduce the sliding friction.

Can we reduce friction to zero?

Friction can be reduced to a great extent by polishing surfaces or by using a large amount of lubricants such as oil, water, or grease but we cannot reduce friction to zero.

Why can we never reduce friction to zero?

Answer Expert Verified No we cannot reduce friction to zero because friction exists at even atomic levels too.

Why friction can never be entirely eliminated?

Friction cannot be entirely eliminated because no surface is perfectly smooth,there will be some irregularities present in every smooth and polished surface. Friction can never be entirely eliminated, because no surface is perfectly smooth, there are always some irregularities present in it.