Friction: Science Trivia Facts! Quiz

2.

What the nature of friction?

It's a conservative force
It's motion in action
It's a non-conservative force
It's a moving force

Correct Answer

A. It's a non-conservative force

Explanation

Friction is considered a non-conservative force because it dissipates energy and does not conserve mechanical energy. When two surfaces are in contact and in relative motion, friction opposes the motion and converts some of the kinetic energy into heat or other forms of energy. This means that the total mechanical energy of the system is not conserved in the presence of friction.

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3.

What is dry friction?

It's a force that opposes the relative lateral motion of 5 solid surfaces in contact
It's a force that opposes the relative lateral motion of 4 solid surfaces in contact
It's a force that opposes the relative lateral motion of 2 liquid surfaces in contact
It's a force that opposes the relative lateral motion of 2 solid surfaces in contact

Correct Answer

A. It's a force that opposes the relative lateral motion of 2 solid surfaces in contact

Explanation

Dry friction is a force that opposes the relative lateral motion of two solid surfaces in contact. This type of friction occurs when there is no lubrication or fluid present between the surfaces. It is caused by the interlocking of microscopic irregularities on the surfaces, which creates resistance to sliding or motion. Dry friction is commonly experienced in everyday situations, such as when trying to push or slide objects across a rough surface.

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4.

What is skin friction?

It's a component of drag the force resisting the motion of a fluid across the surface of a body
It's a component the force resisting the motion of a fluid across the surface of a body
It's a component of drag resisting the motion of a fluid across the surface of a body
It's a component of drag the force resisting the motion of a liquid across the surface of a body

Correct Answer

A. It's a component of drag the force resisting the motion of a fluid across the surface of a body

Explanation

Skin friction is a component of drag that refers to the force resisting the motion of a fluid across the surface of a body. It occurs due to the interaction between the fluid molecules and the surface of the body, resulting in a frictional force that opposes the fluid's motion. This frictional force contributes to the overall drag experienced by the body as it moves through the fluid.

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5.

What causes dry friction?

A combination of inter-surface adhesion and surface contamination
A combination of inter-surface adhesion and surface roughness
A combination of inter-surface adhesion, surface roughness, surface deformation, and surface contamination
A combination of surface roughness, surface deformation, and surface contamination

Correct Answer

A. A combination of inter-surface adhesion, surface roughness, surface deformation, and surface contamination

Explanation

Dry friction is caused by a combination of factors including inter-surface adhesion, surface roughness, surface deformation, and surface contamination. Inter-surface adhesion refers to the attractive forces between the surfaces in contact, which can contribute to friction. Surface roughness creates irregularities that increase the contact area and contribute to friction. Surface deformation occurs when the surfaces are compressed or distorted, leading to friction. Lastly, surface contamination, such as dust or oil, can also increase friction by interfering with the smoothness of the surfaces.

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6.

What is mechanical energy?

It's kinetic energy
It's potential energy
It's the sum of potential energy and kinetic energy
It's the sum of natural energy and kinetic energy

Correct Answer

A. It's the sum of potential energy and kinetic energy

Explanation

Mechanical energy refers to the sum of potential energy and kinetic energy. Potential energy is the energy stored in an object due to its position or condition, while kinetic energy is the energy possessed by an object in motion. Therefore, the correct answer states that mechanical energy is the combination of both potential and kinetic energy.

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7.

Who were the first ones to study friction?

The Romans
The Greeks
The phenicians
The British

Correct Answer

A. The Greeks

Explanation

The Greeks were the first ones to study friction. They made significant contributions to the understanding of friction through their observations and experiments. The Greek philosopher and scientist, Archimedes, conducted experiments on friction and developed the concept of static and kinetic friction. He also discovered that the force of friction is directly proportional to the weight of an object. The Greeks' studies on friction laid the foundation for further advancements in the field and greatly influenced the scientific understanding of this phenomenon.

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8.

When were the classic laws of sliding discovered?

In 1510
In 1505
In 1500
In 1493

Correct Answer

A. In 1493

Explanation

In 1493, the classic laws of sliding were discovered.

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9.

How many factors on friction did Coulomb Investigate?

4
5
6
7

Correct Answer

A. 4

Explanation

Coulomb investigated four factors on friction.

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10.

When was the atomic force microscope created?

In 1986
In 1988
In 1990
In 1991

Correct Answer

A. In 1986

Explanation

The atomic force microscope was created in 1986.

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Friction: Science Trivia Facts! Quiz

How many types of friction are there in total?

Quiz Preview

What the nature of friction?

What is dry friction?

What is skin friction?

What causes dry friction?

What is mechanical energy?

Who were the first ones to study friction?

When were the classic laws of sliding discovered?

How many factors on friction did Coulomb Investigate?

When was the atomic force microscope created?