How to calculate the work done by a force | What is the difference between potential energy and kinetic energy?

Dear Students if you are searching for the question of How to calculate the work done by a force and What is the difference between potential energy and kinetic energy? we can calculate the work done by multiplying the amount of force by the displacement produced in the body. I have discussed in detail the next portion of this article.

Potential Energy and Kinetic Energy are two different forms of energy. Kinetic energy is the energy present in an object due to motion, and Potential Energy is the energy stored in an object due to its position or shape and size of an object. 

I think so, you need to clear your concept of work done in physics. So follow this full post to clear your all doubt about Work done and Energy.

Introduction:

In Our daily life, we are doing lots of work. Like while sitting on a chair, we are solving math problems continuously for 2-3 hours. But if Grandfather asks you. Have you done some work? Then you should say you have done some work. Your grandfather will SAY NO! You should say you have done the work. But in actuality you have not done any work still. Because in physics, the definition of the work done, it is totally different from the Normal. So Now the Question arise!

What is Work in Physics?

Whenever we apply some force and due to applied force if displacement is produced in that case we say work is done. Or in Other Words we can say,

               Work in physics is the transfer of energy to or from an object with the applied force along a displacement.  Or work is done when a force causes an object to move.

The formula for work is:

Work = Force * Displacement

where:

  • Force is the applied force, 
  • Displacement is the distance moved
Physical Quantity  Unit
Force Newton
Displacement Metre

Question may arise🤔

What are unit of Work Done?

Using above units we can say work have unit Newton-metre or Joule.

For example, if you push a box across the floor, you are doing work on the box. The work you do is equal to the force you apply to the box multiplied by the distance you move the box.

What is the Difference Between Work and Energy?

Work is a measure of the Energy transferred, while 

Energy represents the ability to do work. 

There are many different forms of energy, Like

  • Kinetic energy, 
  • Potential energy, and 
  • Thermal energy.

Kinetic Energy:

Kinetic energy is the energy present in an object due to motion, 

Potential Energy

It is the energy stored in an object due to its position or shape and Size of an object. 

Thermal energy

It is the energy of random motion of molecules which can come due the temperature of body.

                                 The work done on an object can change the object’s kinetic energy, potential energy, or both. For example, if you lift a box, you are doing work on the box. The work you do increases the box’s potential energy.

What are the Different Types of Work?

There are three main types of work in physics:

  • Positive work: Work done by a force in the direction of the displacement.
  • Negative work: Work done by a force in the opposite direction of the displacement.
  • Zero work: Work done by a force perpendicular to the displacement.

Positive work is the most common type of work. It is the type of work that you do when you lift a box, push a car, or throw a ball.

Negative work is less common, but it is still important. It is the type of work that you do when you slow down a car, pull a box, or catch a ball.

Zero work is the least common type of work. It is the type of work that you do when you push a box against a wall or lift a box up in the air and then hold it there.

How to Calculate the Work Done by a Constant Force?

The work done by a constant force is calculated by multiplying the force by the displacement. For example, if a force of 100 N moves an object 5 meters, the work done is 500 J.

The formula for work done by a constant force is:

Work = Force * Displacement

         = 100 N * 5 m = 500 J

How to Calculate the Work Done by a Variable Force?

The work done by a variable force is calculated by integrating the force over the displacement. This means that you add up the work done by the force at each point along the displacement.

The formula for work done by a variable force is:

Work = ∫ Force(x) * dx

where:

  • Force(x) is the force as a function of distance
  • dx is a small change in distance

What is the Work-Energy Theorem?

or Statement of Work-Energy Theorem:

The work-energy theorem states that the work done on an object is equal to the change in the object’s kinetic energy. 

In other words, if you do work on an object, it will speed up. And if you slow down an object, you are doing negative work on it.

According to Work-Energy Theorem,

Work Done = Change in Kinetic Energy

The work-energy theorem is a very important law in physics, and it is used in many different applications. 

For example, it is used to calculate the energy needed to launch a rocket, and it is also used to calculate the energy released when an object collides with another object.

The work-energy theorem is expressed mathematically as follows:

Work = ΔKE = KEf – KEi

where:

  • ΔKE is the change in kinetic energy
  • KEf is the final kinetic energy
  • KEi is the initial kinetic energy

Conclusion:

Work is an important concept in physics, and it is used in many different applications. I hope this blog post has helped you to understand the concept of work in physics. If you have a query feel free to contact me in the comment section.

Leave a comment

PLAYER RATING | PARIS SAINT-GERMAIN PSG Unveiling the Mysteries: Can Mass be Converted into Energy? Can Mass Be Negative?