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Free Job oriented Courses for mechanical engineers

mechanical job oriented courses for free

It is most essential to learn job oriented courses for mechanical engineering students. In such courses, you earn new skill that fulfills your mechanical career.
These courses can make you CMM Operator, Quality Engineer, Production Engineer or related to this professional.

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What is the difference between torque and moment?

moment vs torque

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What is the difference between moment and torque is the question that pops up in most of our minds?


In physics, they signify the same thing but in mechanics, they hold slightly different meanings. Both have the same unit i.e. N-m but torque is a movement force whereas the moment Is a static force. Torque is used where there is rotation involved whereas moment Is used where there is no rotation.

movement
Photo by Pixabay


Application of moment and torque for varied and interesting to observe. I hope everyone has played on a seesaw at least once in their life.
What if I tell you that you can keep the saw balanced by having a 120 kg person one side and a 50kg person on the other side?

balancing
Photo by Mike Anderson


It seems difficult to accept but if you place them in such a way that the lighter person is at 3m from the center and the healthy person is at 1m. They both will apply the same moment and the seesaw will be balanced.


In rural areas, people still use the concept of the moment to churn milk. By providing a torque to the handle with the help of the rope the wooden stick rotates about its axis and thus, in turn, churns the milk.

strength of machine


A similar concept of torque is used in old dams where the force of the falling water rotated the water wheel. The water wheel was connected to a dynamo thus generating electricity by the principle of conversion of kinetic energy into potential energy.

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International System of Units of Measurement(7 units of Measurement)

7 si units

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The International System of Units (SI)has become the fundamental basis of scientific measurement worldwide. This system is an extension and refinement of the metric system, which is more superior and convenient than other systems. It provides one basic unit for each physical quantity. So, the 7 units of measurement are follow 

1. Mass

The basic fundamental unit of mass is “Kg”. We also measure mass in Gram, Pound, Metric ton, Stone, Microgram, Carat, etc. 

mass weight
Photo by Victor Freitas

2. Time

The basic fundamental unit of Time is “Sec(s)”. We also express time in seconds, minutes, hours, days, weeks, years, etc

time
Photo by Moose Photos

3. Electric Current –

The basic fundamental unit of Electric Current is “Ampere(A)”. 

current
Photo by Pok Rie

4. Amount of Substance –

The amount of Substance is a dimensionless expression of the number of particles in a particle or object. The basic fundamental unit of Amount of Substance is “Mole”. The amount of substance all called material quantity.

5. Illumination

The SI unit of Illumination is “Candela”. Candela is denoted by symbol ‘cd’. Some other units are lux, lumen, etc.

light
Photo by freestocks.org

6. Distance

The SI unit of Distance is “Meter”. Distance also measures in mm, cm, km, yard, inch, foot, feet, etc. 

distance
Photo by Krivec Ales

7. Temperature

The SI unit of temperature is “kelvin”, expressed as the word “K”.Temperature 0 K is known as “absolute zero.”

We use two types of scale in measuring temperature that is –

1.Relative scales [Fahrenheit (°F) and Celsius (°C)]

2. Absolute scales [Rankine (°R) and Kelvin (K)].