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How To Describe Motion In Physics

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Calculate The Change In Velocity Values By Using The Area Under Each Part Of The Graph

Describing Motion for Physics

The motion of the car can be divided into three time sections: \ \ seconds \ \ seconds and \ \ seconds. To be able to draw the velocity vs. time graph, the change in velocity for each time section needs to be calculated. The change in velocity is equal to the area of the square under the graph:

For \ \ seconds:

The change in velocity of the car from \ to \ is \ \.

For \ \ seconds:

The change in velocity is \ \ from \ to \. In other words, the velocity remains constant during this time interval.

For \ \ seconds:

The acceleration had a negative value, which means that the velocity decreased. It started with a velocity of \ \ at \ and the velocity decreased by \ to give a final velocity of \ at \.

List Of Imperceptible Human Motions

Humans, like all known things in the universe, are in constant motion :89 however, aside from obvious movements of the various external body parts and locomotion, humans are in motion in a variety of ways which are more difficult to perceive. Many of these “imperceptible motions” are only perceivable with the help of special tools and careful observation. The larger scales of imperceptible motions are difficult for humans to perceive for two reasons: Newton’s laws of motion which prevents the feeling of motion on a mass to which the observer is connected, and the lack of an obvious frame of reference which would allow individuals to easily see that they are moving. The smaller scales of these motions are too small to be detected conventionally with human senses.

What Is Vibratory Motion

The motion of a body about its mean position is known as vibratory motion.

Consider a baby in a swing as shown in the above figure. As it is pushed, the swing moves back and forth about its mean position. The motion of the baby repeats from one extreme to the other extreme with the swing.The motion of the pendulum of a clock about its mean position is also an example of vibratory motion.

Children playing in a sea-saw is an example of vibratory motion.Besides these examples a baby in a cradle moving to and fro, to and fro motion of the hammer of a ringing electric bell and the motion of the string of a sitar are some of the examples of vibratory motion. Simple harmonic motion is also an example of vibratory motion.

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A Description Of The Object’s Motion

A brief description of the motion of the object could read something like this: At \ the object is stationary at some position and remains stationary until \ when it begins accelerating. It accelerates in a positive direction for \ \ until \ and then travels at a constant velocity for a further \ \.

Relative Motion With Examples

Chapter 2: Describing motion


When we talk about the velocity of something we first determine a reference point and then according to this reference point we say the velocity of the object. For example, you are in a bus and it goes with the velocity of 50 m/s to the east, then a truck passes you with a velocity of 60m/s to the east. When the truck is next to the bus you feel that as you go backward to the west or when the two cars have same velocity when you look another car you feel you do not move. On the contrary, consider the below examples, if you look at the stationary objects at the ground when you travel, then you feel yourself travel with the velocity of the car. All these are the result of relative motion. Velocity of the moving objects with respect to other moving or stationary object is called relative velocity and this motion is called relative motion. Reference point is too important in physics. We do all calculations according to the reference points. For instance, we observe the plane flying in the air, velocity of that plane with respect to us is the sum of the velocities of plane and the wind. However, the same plane has different velocity with respect to the flying other plane. To sum up, we determine the directions and quantities of velocity of the objects with respect to a chosen reference point. We look at some examples and vector notations of relative velocity of the objects.


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How Do We Study Motion

Under kinematics, we study motion of bodies without going into the cause of motion, we study about velocity and acceleration mainly. Under dynamics, the forces are taken into consideration and according to the Newtons second law, it directly impacts the acceleration and as result the motion of bodies.

Quick Answer: How Do You Describe Motion In Physics

Motion is a continuous change in the position of an object with respect to a stationary object. It is described in terms of displacement, distance, velocity, acceleration, time and speed. Motion: A body is said to be in motion when it changes its position with reference to a fixed reference point called the origin.

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Determine The Area Under The Velocity Vs Time Graph

Break the motion up: \ \ seconds, \ \ seconds, \ \ seconds and \ \ seconds.

For \ \ seconds: The displacement is equal to the area of the triangle on the left:

For \ \ seconds: The displacement is equal to the area of the rectangle:

For \ \ seconds the displacement is equal to the area of the triangle above the time axis on the right:

For \ \ seconds the displacement is equal to the area of the triangle below the time axis:

Describing Motion In One Dimension

Description of Motion: Describing Motion with an Apple â Physics | Lecturio

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  • Describe motion in 1D using functions and defining an axis.
  • Define position, velocity, speed, and acceleration.
  • Use calculus to describe motion
  • Define the meaning of an inertial frame of reference.
  • Use Galilean and Lorentz transformations to convert the description of an objects position from one inertial frame to another.

In this chapter, we will introduce the tools required to describe motion in one dimension. In later chapters, we will use the theories of physics to model the motion of objects, but first, we need to make sure that we have the tools to describe the motion. We generally use the word kinematics to label the tools for describing motion , whereas we refer to dynamics when we use the laws of physics to predict motion .


You throw a ball upwards with an initial speed \. Assume there is no air resistance. When you catch the ball, its speed will be…

  • greater than \.
  • less than \.
  • in the opposite direction.
  • The most simple type of motion to describe is that of a particle that is constrained to move along a straight line much like a train along a straight piece of track. When we say that we want to describe the motion of the particle , what we mean is that we want to be able to say where it is at what time. Formally, we want to know the particles position as a function of time, which we will label as \\). The function will only be meaningful if:

  • This page has no tags.
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    What Is Motion Physics

    Motion refers to a change in location. Physics is the scientific study of matter, energy, and the interactions between them. It includes fields such as acoustics, cryogenics, electromagnetism, optics, and mechanics, which refers to the study of how force act on matter or material systems and includes motion physics, the scientific study of movement.

    In motion physics, it is typical to speak of the change in location of a body. Applied force is the initiator of a change in motion, which can mean starting motion, stopping motion, or changing direction. Without an applied force, bodies tend to resist acceleration and to stay at rest if they are at rest or, when moving in a straight line, to continue moving in a straight line.

    Motion is usually described using several typical parameters, including velocity. Velocity is the rate of change in a bodys position, so it refers to both speed distance covered in a certain amount of time and direction, and so it is a vector. Despite this, it is often represented by the equation v = d/t, where v represents velocity, d represents distance, and t represents time. It is usually reported in meters per second.

    How Many Types Of Motion In Physics

    If we observe carefully, we will find that everything in the universe is in motion. However, different objects move differently.

    Some objects move along a straight line, some move in a curved path, and some move in some other way. According to this, we can say that there are three types of motion. Which are given as:

    • Translatory motion
    • Vibratory motion

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    Types Of Motion In Physics

    Motion of an object depends on the type of force acting on the body. Examples of different kinds of motion are given below.

    • Translational It is the type, where an object moves along a path in any of the three dimensions.
    • Rotational It is the type, where an object moves along a circular path about a fixed axis.
    • Linear It is a type of translational motion where the body moves in a single direction along a single dimension.
    • Periodic It is the type of motion that repeats itself after certain intervals of time
    • Simple Harmonic It is the type of motion like that of a simple pendulum where a restoring force acts in the direction opposite to the direction of motion of the object. This restoring force is proportional to the displacement of the object from mean position.
    • Projectile It is the type of motion which has a horizontal displacement as well as vertical displacement.
    • Oscillatory It is the type of motion which is repetitive in nature within a time frame. If it is mechanical in nature it is called vibration.

    How Do We Describe The Motion Of An Object

    Relative motion

    4.3/5describe the motion of an objectobjectexplained here

    Newton’s first law of motion: An object moves at constant velocity unless a net force acts to change its speed or direction. This is also called the law of inertia Imagine a spacecraft moving through space. No force means no acceleration, and an object continues on with the same speed.

    Likewise, how are position and speed useful for describing the motion of an object? An object’s motion depends on how it changes position. Motion can be described using speed, velocity, or acceleration. Speed is how fast an object moves. Velocity describes an object’s speed and the direction it moves.

    Then, how can the motion of an object be measured?

    To measure motion, an object must have movement. This is defined as starting from one location in space and ending at a different location in space. Often, the amount of time taken to get from one point to the other is also included to calculate the speed of motion, though time is not necessary to indicate movement.

    When can you say that an object is in motion?

    We say that an object is in motion when the surroundings of the object changes position from time to time .

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    What Are Fruits Examples

    Common types of fruits that are readily available include:

    • Apples and pears.
    • Citrus oranges, grapefruits, mandarins and limes.
    • Stone fruit nectarines, apricots, peaches and plums.
    • Tropical and exotic bananas and mangoes.
    • Berries strawberries, raspberries, blueberries, kiwifruit and passionfruit.

    Examples Of Vector Quantities

    Some examples of vector quantities include:

    • force, eg 20 newtons to the left
    • displacement, eg 50 kilometres east
    • velocity, eg 11 metres per second upwards
    • acceleration, eg 10 metres per second squared downwards
    • momentum, eg 250 kilogram metres per second south west

    of an object is its speed in a particular direction. Velocity is a vector quantity because it has both a magnitude and an associated direction. To calculate velocity, displacement is used in calculations, rather than distance.

    Unlike distance, which is a scalar quantity, displacement is a vector quantity. It includes:

    • the distance travelled, measured in a straight line from start to finish
    • the direction of the straight line

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    How Is Kinematics Be Applied In Real Life

    For example, in machine components it is common to use kinematics analysis to determine the speed of an object, that is connected to another object moving at a known speed. For example, one may wish to determine the linear velocity of a piston connected to a flywheel that is turning at a known speed.

    Velocity Vs Time Graph For \ \ Seconds

    Describing Motion â Physics Cbse Class 9

    For the first \ seconds we can see that the position remains constant – so the object is not moving, thus it has zero velocity during this time. We can reach this conclusion by another path too: remember that the gradient of a displacement vs. time graph is the velocity. For the first \ seconds we can see that the displacement vs. time graph is a horizontal line, i.e.. it has a gradient of zero. Thus the velocity during this time is zero and the object is stationary.

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    What Is Rotatory Motion

    The spinning motion of a body about its axis is called its rotatory motion.Study the motion of a tap. It is spinning about an axis. Particles of the spinning top move in circles and thus individual particles possess circular motion. Does the top possess circular motion?

    The top spins about its axis passing through it and thus it possesses rotatory motion. An axis is a line around which a body rotates. In a circular motion, the point about which a body goes around is outside the body. In rotatory motion, the lone, around which a body moves about, is passing through the body itself.

    Rotatory motion examples

    • The motion of the earth about its geographic axis that causes day and night is rotatory motion.
    • The motion of the wheel about its axis and that of the steering wheel are examples of rotatory motion.

    Description Of Motion In One Dimension

    A bar above any quantity indicates that it is the average value of that quantity. If the acceleration is constant, then equations 1,2 and 3 represent a complete description of the motion. Equation 4 is obtained by a combination of the others. Click on any of the equations for an example.

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    Give Some Examples Of Motion

    Examples of motion are:

  • The flow of air in and out of our lungs.
  • The automobiles that carry passengers from the place of pick up to the destination.
  • Put your understanding of this concept to test by answering a few MCQs. Click Start Quiz to begin!

    Select the correct answer and click on the Finish buttonCheck your score and answers at the end of the quiz

    What Is Motion In Physics

    APS, Golconda

    Surroundings are the places in their neighborhood where various objects are present. The state of rest or motion of a body is relative.

    For example, a passenger sitting on a moving bus is at rest because he is not changing his position with respect to other passengers or objects on the bus. But to an observer outside the bus, the passengers and the objects inside the bus are in motion.

    Therefore we can define rest as A body is said to be at rest if it does not change its position with respect to its surroundings.

    We live in a universe of continual motion. In every piece of matter, the atoms are in a state of never-ending motion. We move around the Earths surface, while the earth moves in its orbit around the sun. The sun and the stars, too, are in motion.

    Everything in the vastness of space is in a state of perpetual motion. Every physical process involves the movement of some sort. Because of its importance in the physical world around us. It is logical that we should give due attention to the study of motion. Motion is commonly described in terms of:

    • Displacement

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    Determine The Total Displacement Of The Car

    Now the total displacement of the car is just the sum of all of these areas. HOWEVER, because in the last second to \) the velocity of the car is negative, it means that the car was going in the opposite direction, i.e. back where it came from! So, to find the total displacement, we have to add the first \ areas and subtract the last one .

    What Is Motion And Examples

    motion means displacement or change in the position of an object over time. It can be described in terms of displacement, distance, velocity etc. eg pushing a block is an example of linear motion, opening a door is an example of rotation, rotating stone with attached thread is an example of a circular motion.

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