1) Explain the different types of motion
a) Tanslatory motion
b) rotatory motion
c) Oscillatory motion
d) Vibratory motion
e) Periodic motion
f) Non-periodic motion
g) Multiple motion
h) Rolling motion
i) Random motión
j) Uniform motion
k) Non-uniform motion
Answers
Answer:
Explanation:
Periodic Motion
What is common in the motion of the hands of a clock, motion of the wheels of a car and motion of a planet around the sun? They all are repetitive in nature, that is, they repeat their motion after equal intervals of time. A motion which repeats itself in equal intervals of time is periodic.
A body starts from its equilibrium position(at rest) and completes a set of movements after which it will return to its equilibrium position. This set of movements repeats itself in equal intervals of time to perform the periodic motion.
Circular motion is an example of periodic motion. Very often the equilibrium position of the body is in the path itself. When the body is at this position, no external force is acting on it. Therefore, if it is left at rest, it remains at rest.
Period and Frequency of Periodic Motion
We know that motion which repeats itself after equal intervals of time is periodic motion. The time interval after which the motion repeats itself is called time period (T) of periodic motion. Its S.I.unit is second.
The reciprocal of T gives the number of repetitions per unit time. This quantity is the frequency of periodic motion. The symbol υ represents frequency. Therefore, the relation between υ and T is
υ = 1/T
Thus, the unit of υ is s-1 or hertz(after the scientist Heinrich Rudolf Hertz). Its abbreviation is Hz. Thus, 1 hertz = 1 Hz = 1 oscillation per second = 1 s-1 The frequency of periodic motion may not be an integer. It can be a fraction.
Oscillatory Motion
Every body at rest is in its equilibrium position. At this position, no external force is acting on it. Therefore, the net force acting on the body is zero. Now, if this body is displaced a little from its equilibrium position, a force acts on the body which tries to bring back the body to its equilibrium position. This force is the restoring force and it gives rise to oscillations or vibrations.
For example, consider a ball that is placed in a bowl. It will be in its equilibrium position. If displaced a little from this position, it will perform oscillations in the bowl. Therefore, every oscillatory motion is periodic but all periodic motions are not oscillatory. Circular motion is a periodic motion but not oscillatory motion.
There is no significant difference between oscillations and vibrations. When the frequency is low, we call it oscillatory motion and when the frequency is high, we call it vibrations. Simple harmonic motion is the simplest form of oscillatory motion. This motion takes place when the restoring force acting on the body is directly proportional to its displacement from its equilibrium position.
In practice, Oscillatory motion eventually comes to rest due to damping or frictional forces. However, we can force them by means of some external forces. A number of oscillatory motions together form waves like electromagnetic waves.
a) The motion in which all the particles of a body move through the same distance in the same time is called translatory motion. There are two types of translatory motions: rectilinear motion; curvilinear motion.
b) In simple terms, rotatory motion can be defined as the movement of any object about an axis. A common examples of rotatory motion can be the fans of the helicopter moving about a pivot. Another example could be or the movement of a merry go round.
c) Oscillatory motion. ... Oscillatory motion can be termed as the repeated motion in which an object repeats the same movement over and over
d) body moves to and fro about its mean position is called vibratory motion. Vibratory motion can be described as any object moving/swinging back and forth, moving up and down, pulsating, spinning, or vibrating. swinging; pendulums, swings, metronomes are the example of vibratory motion.
e)Periodic motion, in physics, motion repeated in equal intervals of time. Periodic motion is performed, for example, by a rocking chair, a bouncing ball, a vibrating tuning fork, a swing in motion, the Earth in its orbit around the Sun, and a water wave. ... Simple harmonic motion is a special case of periodic motion.
f) Non Periodic Motion. The name itself implies that this type of motion does not repeat itself after a fixed time interval. Even though the motion of a body repeats, it can be non-periodic motion if it does not have a fixed time for repetition.
g) When a body possesses more than one simple motion, it is called a multiple motion. Example: You are travelling by a train. Your wrist watch is also sharing the linear motion of the train. But the hands of the watch are also undergoing rotational motion. Thus they have 2 kinds of motion, i. e. multiple motion.
h) Rolling is a type of motion that combines rotation (commonly, of an axially symmetric object) and translation of that object with respect to a surface (either one or the other moves), such that, if ideal conditions exist, the two are in contact with each other without sliding.