Difference between energy and force?

The force necessary to move an object up an inclined plane is less than the force necessary to move it straight up, because the gravitational force is acting on the object at an angle.
  • #1
What is difference between energy and force? Is energy just a measurement of a force?


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Simple example: Holding a rope taut is using force. Pulling something with rope is using energy.
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Energy is a 'property' which you have when a force is applied over a certain distance. It's sort of counting up all the force which has acted on you, and giving a number you can use to make calculations simpler.
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energy is sort of the potential to exert a force.

more accurately, energy is the potential to do work, but work is a function of force.

forces change the way things move. to make something move, change direction or stop moving, you need to exert a force on it. but you cannot exert a force unless you have the energy to do so.

when you move your mouse, your hand exerts a force on the mouse to move it. the energy required to exert that force comes from the energy stored in your muscles.

another example: think about bowling a ball at some skittles. when the ball is rolling, it has energy (kinetic energy), when it hits the skittles, it uses up that energy to exert a force on the skittles. the force knocks the skittles over. the movement of the ball gives it the energy to exert that force.
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  • #5
Originally posted by syano
What is difference between energy and force? Is energy just a measurement of a force?

A big difference between the two is that force can be changed to much larger or smaller values by simple devices such as levers, screws, etc. But energy is a conserved quantity. So a given quantity of energy can be expended by applying a relatively large force over short distance, or smaller force over longer distance.
  • #6
Also important: there is a "conservation of energy" law. There is no "conservation of force". In order to lift an object with weight 1 Newton a height of 1 meter, I MUST do 1Newton* 1 meter= 1 Joule of work. But if I use an inclined plane instead of lifting it straight up, I can reduce the force necessary.

1. What is the difference between energy and force?

Energy and force are both physical quantities used to describe the behavior of objects. However, they are fundamentally different concepts. Energy is the ability of an object to do work, while force is a push or pull on an object that causes it to accelerate.

2. How are energy and force related?

Energy and force are related in that force is required to transfer energy from one object to another. For example, when a person throws a ball, they exert a force on the ball, transferring their energy to the ball and causing it to move.

3. Can energy be converted into force?

No, energy cannot be converted into force. Force is a vector quantity with a specific direction and magnitude, while energy is a scalar quantity. However, energy can be converted from one form to another, such as potential energy being converted into kinetic energy.

4. How does the conservation of energy relate to the conservation of force?

The conservation of energy states that energy cannot be created or destroyed, only transferred or converted from one form to another. Similarly, the conservation of force states that forces cannot be created or destroyed, only transferred or balanced out by other forces.

5. What are some real-life examples of energy and force?

Some examples of energy include the energy stored in a battery, the energy of motion in a moving car, and the energy of a person walking. Examples of force include the force of gravity pulling objects towards the Earth, the force exerted by a person pushing a shopping cart, and the force of a bat hitting a baseball.

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