Draft work and energy concepts

By Robert Hazen, PhD, George Mason University

Power is a subtle concept, its characteristics are not easily understood or obvious. What are the different types of energy we encounter in our daily lives and what are its subtle forms?

A cyclist who goes up and then goes downhill
The obvious types of energy include kinetic energy and potential energy. (Image: udaix / Shutterstock)

Theory of work

Work has a very limited scientific meaning. Whenever a force moves at a distance, it goes out of its way, and the standard definition of the work is twice as long. To give an example, if your car runs out of gas, you are working as long as it does not push and move. However, even if it is pushed, if the car does not move, you are not doing any work.

Work only works when the force is moving in the same direction as the object. Therefore, the earth does not work on the moon because the movement of the moon is always at right angles to gravity. The unit of work is joule, in other words, Addison-meter.

Learn more about the commanded universe.

Expressing power

Power is defined as the ability to work, that is, the ability to work remotely. Therefore, any physical system or event that allows them to generate energy at a distance is a type of energy.

Until the middle of the 19th century, the concept of power was not well defined. It is difficult to partially identify and describe the energy that can take many different forms in our environment.

Different types of energy

In our daily life, there are three common types of energy that are known for their ability to increase distance. Kinetic energy, potential, and wave energy are clear pathways that transmit energy beyond distance. Once scientists understood the meaning of energy, they began to see some other subtle forms — heat, light, and mass.

Learn more about the first law of thermodynamics.

Kinetic energy

Probably the most easily recognizable form of energy is kinetic energy, carried by moving objects. A simple example is when you throw a ball, the ball passes through a window and can break things, which means it acts violently from a distance.

The kinetic energy of anything can be calculated from mass and speed. The kinetic energy equation F = (½) (mv2) Is derived from Newton’s second law of motion [F=m×a], The distance is equal to half the acceleration time [d= (½)(a´t2)] And velocity includes acceleration time; [v=a×t].

KE = F × d

F = m × a and d = (½) (a´ × t2)

By substituting these two equations for the CA formula,

KE = m × a (½) (a´ × t2)

K = (½) m (b)2

We know the velocity, v = a × t

Therefore, KE = (½) mv2

From the above formula, we know that kinetic energy is proportional to the minimum square, so a small increase in speed can significantly increase the force and have this effect.

First of all, let’s say you drive faster and faster in a car, you have to put energy in the car to get that fuel because you consume a lot of gasoline. When you travel at high speeds, your gas consumption, per mile, will begin to plummet.

The second thing is if you are in an accident, when you are in an accident, all of your kinetic energy is converted to other forms of energy, your car breaks down. There is a lot of power that needs to be converted to high-speed damage to the car, and therefore, high-speed crashes are more harmful compared to low-speed accidents.

This is a copy of the video series The joy of science. Watch now on Wondrium.

Potential

Many natural systems store energy, which is being used and used remotely. Their various forms are called potential. The most obvious type of energy in daily practice is gravity, such as the water behind a dam.

This force is due to the mass gravity of the earth’s gravity. At a higher level, the water is waiting to release and release energy, converting gravity into kinetic energy.

A triangular diagram with a gravitational force formula
Formula for gravity. (Image Nasky / Shutterstock)

Bringing a formula

To lift the weight, m, to the height, h, takes work.

We know, work = Fxd (labor distance)

In simple terms, energy = we know work

Gravity on an object = mass times the height of gravity acceleration times

Therefore, the force exerted by an object = (m × g) × h

There are many other forms of energy in our daily lives. In food, there is a chemical potential in matches and batteries used to light candles. In refrigeration magnets there is power that can exert power from a distance by lifting objects. There is also the potential for elasticity in a stretched rubber band.

Learn more about entropy.

Storm Energy

Waves really represent a very effective kinetic energy that travels long distances without moving many places. There are two types of waves that can perform this function in very different ways. Crossing waves and compression waves.

Wave characteristics

Waves are fast; This can be seen using a telephone cable. The song itself should not move from one place to another, but the movement of the waves can be seen by turning slightly from one end to the other and passing the wave.

Waves can travel through water, the atmosphere, and solid objects. Earthquakes are waves that can transmit a tremendous amount of energy through a solid earth.

Learn more about magnetism and static electricity.

Hidden energy types

Designated types of energy collection program.
Solar energy is the main source of energy on earth. (Image: VectorMine / Shutterstock)

Heat is actually an atomic force of atomic energy that represents the movement of individual atoms.

Light is another hidden form of energy. Solar energy is the main source of energy on earth. Sunlight travels at 186,000 miles per second or 300,000 km per second at all intervals, including vacuum.

And finally, quantity as a form of energy, one of the inventions of the modern science of Albert Einstein. This is based on the well-known formula E = mc2, C at the speed of light. The implication is that the amount of energy in everyday items is unimaginable. While much of this energy is trapped in the masses around us, scientists have discovered unique ways to convert weight into energy.

Common questions about hidden work and energy concepts

Q: What are the different examples of gravity from everyday experience?

Of Accumulated energy The water behind the dam and the weight of the pendulum are examples of gravity Potential.

Q: What are the two different types of waves?

Transverse waves and compressed waves are two different types Waves.

Q: Is wave energy transmitted through various media?

Yes, Storm force It transmits through various means, such as solids, liquids, and gases.

Keep reading
Photons and wavelengths – Is light a particle or a wave?
Misconceptions about thermodynamics – Does heat really rise?
How Einstein solved Newtonian physics
Wave or particle – What is light?

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