what is motion?plz explain the types of motions
Answers
Answer:
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What is Motion?
We can define motion as the change of position of an object with respect to time. A book falling off a table, water flowing from the tap, rattling windows, etc all exhibit motion. Even the air that we breathe exhibits motion! Everything in the universe moves. We live in a universe that is in continual motion. The fundamental particle of a matter that is the atom is in constant motion too. Every physical process in the universe is composed of motion of some sort. The motion can either be swift or slow, but motion exists. It is important that we give due attention to the study of motion because of its importance in the physical world. Motion is mainly described in terms of the following terms:
Distance
Displacement
Speed
Time
As discussed earlier, distance and displacement are used to describe the change in position. Now if someone asks what the distance between A and B is, we can’t give a definite answer because it depends on the path taken. It may or may not be the same for all three paths. But for displacement, we can always give a definite answer as it is a straight line joining the two points. In other words, displacement is nothing but the shortest distance between the two points, which in this case is Path 2. Also, it has a particular direction from A to B, as we can see.
So now that we have a basic idea of both we will try to solve an example: Suppose the distance between two cities A and B is ‘d’. A person goes from A to B and returns. Calculate distance travelled and displacement.
Distance travelled = Total path length covered
= d + d
= 2d
Talking about displacement, it is measured as the shortest distance between the initial and final position. In this case, both are the same and hence, displacement is also zero.
So for a motion, can displacement be greater than the distance covered? Think about it, and if not can it be equal?
Types Of Motion
We might have noticed that different objects move differently. Some objects move in a curved path, some in a straight path and a few others in a different way. According to the nature of the movement, motion is classified into three types as follows:
Linear Motion
Rotary Motion
Oscillatory Motion
Linear Motion
In linear motion, the particles move from one point to another in either a straight line or a curved path. The linear motion depending on the path of motion is further divided as follows
Rectilinear Motion – The path of the motion is a straight line.
Curvilinear Motion – The path of the motion is curved.
A few examples of linear motion are the motion of the train, football, the motion of a car on the road, etc.
Rotatory Motion
Rotatory motion is the motion that occurs when a body rotates on its own axis. A few examples of the rotatory motion are as follows:
The motion of the earth about its own axis around the sun is an example of rotary motion.
While driving a car, the motion of wheels and the steering wheel about its own axis is an example of rotatory motion.
Oscillatory Motion
Oscillatory motion is the motion of a body about its mean position. A few examples of oscillatory motion are
When a child on a swing is pushed, the swing moves to and fro about its mean position.
The pendulum of a clock exhibits oscillatory motion as it moves to and fro about its mean position.
The string of the guitar when strummed moves to and fro by its mean position resulting in an oscillatory motion.
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Explanation:
Motion is a change in position of an object with respect to time .