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Motion along a straight line.
Free fall acceleration:
If you throw something vertically upward and could somehow eliminate or ignore the effect of drag and air on the object , Then the object accelerates constantly when it goes up and falls down , This is called free fall.
If something falls freely under the effect of earth’s gravity without any effect of air then the phenomenon is called free fall.
While the free fall ,
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Constant acceleration:
Acceleration is said to be constant when the rate of change of velocity of an object is constant.
In many types of motion , The acceleration is either constant or approximately constant , For example when you drive a car and accelerate it , you accelerate it in almost constant rate.
When you are in a constant acceleration your Position-Time , Velocity-Time and Acceleration-T
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Acceleration:
When the velocity of a particle changes then it is said to undergo acceleration.
Acceleration is a vector quantity.
When velocity of the object increases then the acceleration is positive and when velocity decreases the acceleration is negative and is called deceleration.
Mathematically,
For an motion along an axis:
Average acceleration =
Where , “v2″ is the velocity at
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Instantaneous velocity:
Beside instantaneous velocity , average velocity is a way of defining how fast a body is moving.But average velocity is only the average of the velocity of body over a given time interval , and not the exact measure of velocity of a body at an instant.
The exact measure of velocity of a body at an instant or over a very-very-very short time interval is known as instant
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Average velocity:
Average velocity is the measure of the average change of position of an object in any given time interval.
Mathematically,
Average velocity =
Where , = Total change in position , = total time interval.
= position of the object at two different time and = Different time.
Average velocity does not depend on the actual path followed by the object , It only depends on the initial
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The laws of physics are expressed as mathematical relationships among physical quantities. Most of these quantities are derived quantities, or they can be expressed as combination of some basic quantities. There are mainly three quantities in physics or mechanics, Length , Mass and Time.
To do calculations and analysis in physics a standard is established for each of these three quantities.
Which
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What is Position?
Position of an object is its location. In science, to find the position of an object we take a reference point or already known location and compare the location of two. We regard a place as reference point as the origin and find the distance of the object from the origin to find it’s location as shown in figure below.
in above Example there are two Objects whose positi
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What is Motion?
Motion is the process of changing of position by an object. Everything around us is in motion even seemingly stationary things like buildings , road is moving along with rotation of earth , every planet orbits the sun which orbits center of galaxy and galaxy itself is in motion. The study and comparison of “Motion” is called “Kinematics” in physics.
Genera
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