write about motion and their types
Answers
Answer:
There
are different types of motion: translational, rotational, periodic, and non periodic motion.
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Answer:
- What is Motion
When a body does not change its position with time, we can say that the body is at rest, while if a body changes its position with time, it is said to be in motion.
- Linear motion is motion in a straight line.
Non-linear motion is motion that is not in a straight line.
When analysing linear and non-linear motion, distance, displacement, speed, velocity, acceleration and deceleration are some commonly encountered physical quantities.
- Types Of Motion
There are different types of motion: translational, rotational, periodic, and non periodic motion.
- Translational Motion
A type of motion in which all parts of an object move the same distance in a given time is called translational motion. Examples are vehicles moving on a road, a child going down a bird flying in the sky. Translational motion can be of two types, rectilinear and curvilinear. Table shows the differences between rectilinear and curvilinear motions.
- Rectilinear motion
1. When an object in translational motion moves in a straight line, it is said to be in rectilinear motion.
2. Examples are a car moving on a straight road and a train moving on a straight
- Curvilinear motion
1. When an object in translational motion moves along a curved path, it is said to be in curvilinear motion.
2Examples are a stone thrown up in the air at an angle and a car taking a turn.
- Rotational Motion
When an object moves about an axis and different parts of it move by different distances in a given interval of time, it is said to be in rotational motion. Examples of objects undergoing rotational motion are blades of a rotating fan, merry-go-round, blades of a windmill. When an object undergoes rotational motion, all its parts do not move the same distance in a given interval of time. For example, the outer portion of the blades of a windmill moves much more than the portion closer to the centre.
A merry-go-around shows rotational motion
- Periodic Motion
A type of motion that repeats itself after equal intervals of time is called periodic motion. Examples of objects undergoing periodic motion are the to and fro motion of a pendulum, the Earth (rotating on its axis), the hands of a clock, the blades of a rotating electric fan, and the plucked string of a guitar
- Non-periodic Motion
A motion that does not repeat itself at regular intervals or a motion that does not repeat itself at all is called non-periodic motion. Examples of non-periodic motion are a car moving on a road, a bird gliding across the sky, and children playing in a park. In everyday life, we observe more than one type of motion, like
Birds gliding across the sky (translational and non periodic).
Rotation of the Earth on its axis (rotational and periodic).
- According to Directions
One dimensional motion is the motion of a particle moving along a straight line.
Two dimensional motion A particle moving along a curved path in a plane has
2-dimensional motion.
Three dimensional motion Particle moving randomly in space has 3-dimensional motion.
- According to State of Motion
Uniform Motion: A body is said to be in a state of uniform motion if it travels equal distances in equal intervals of time. If the time distance graph is a straight line the motion is said to be uniform motion.
Non-uniform motion: A body has a non-uniform motion if it travels unequal distances in equal intervals of time. Ex. a freely falling body.
Time – distance graph for a body with non-uniform motion is a curved line.
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