In our daily life there are various kinds of natural forces that we can feel. We can feel the earth’s sway, the heat of the sun, the breeze on the sea, the air pressure, and even electrostatic electricity which is produced when two bodies come in contact with each other. If we could feel all these natural forces then we would have a good idea about how the universe operates. The electrical charges that are produced also occur due to forces.
There are three basic examples of these forces. One example is the force of gravity. In this force the object moves because of some reason. Another example is the force of magnetism. In this force the object is attracted to some magnetic field. A third example is the force of electrostatic charge.
Let us take the first example of gravitational force. There are a certain mass M and a certain mass K. If there is some kind of invisible force that has the power to attract the mass M and the mass K then the weight of the object will be decreased due to the attracting force. The amount of decrease in weight depends upon the distance between the two objects.
So far so good. However it does not end here because there is a lot more that you have to learn. This is because the second law of thermodynamics, the conservation of momentum, and the law of conservation of energy all come into play and therefore make sure that there is a perpetual motion or an endless motion.
Here is another example of a natural force. Let us say that you have your finger on a button that is 0 meters from your body. How much force does it exert upon your finger? Well, since it is a constant you will not find any change in the amount of force that is exerted upon it. That is why scientists say that the amount of force that is exerted upon an object cannot be changed, only the amount of times the force is applied.
Now this can lead one to conclude that the amount of motion that is produced by the finger will always be the same, unless the object is moved. This can also be deduced by observation. If we have our finger pressed on a table and its bottom edge is pushed away from us by a table leg then the distance travelled by the bottom of the table to our finger will always be the same. It may be slightly greater or slightly less. Therefore the law of physics says that if you push something away from you then it will go back.
We are now well upon the basics of Physics and are beginning to understand that force is nothing more than a measure of the effort that is required to move an object from a point A to a point B. There can be many different kinds of force that are used to move objects, but they all come down to a ‘force’ or ‘ampere’. In our second step we saw that force can be measured in terms of its effect on an object or in terms of its capacity to alter the object’s position. The kind of force to be considered here is the frictional force. Force frictional acts to change the shape of an object by making it bend or make it move at a particular rate.
Friction is a non-zero torque. This means that the force will be constant unless it is zero. We can define the instantaneous force as the force acting on an object after it has had time to react. The instantaneous force is then measured in terms of its sine wave velocity, the time required for it to decrease to zero and the resultant acceleration (time t). A combination of these two components gives the actual acceleration.