Lesson 1: Newton's First Law of Motion
a. Newton's First Law
b. Inertia and Mass
c. State of Motion
d. Balanced and Unbalanced Forces
Lesson 2: Force and Its Representation
a. The Meaning of Force
b. Types of Forces
c. Drawing Free-Body Diagrams
d. Determining the Net Force
Lesson 3 : Newton's Second Law of Motion
a. Newton's Second Law
b. The Big Misconception
c. Finding Acceleration
d. Finding Individual Forces
e. Free Fall and Air Resistance
Lesson 4 : Newton's Third Law of Motion
a. Newton's Third Law
b. Identifying Action and Reaction Force Pairs
Introduction To Physics
Introduction to Physics
What is Physics?
Do you find Physics is an interesting Subject? Most of you answer 'No' for it. Why? The reason behind this is that we are unable to understand physics fully and we are forced to study this subject to score mark in exam.
But Physics is really an interesting subject if we want to gain the real concept of Physics.
And here we are going to present the same to you.
Now, Physics is the study of nature and its laws. We expect that all these different events in nature take place according to some basic laws and revealing these laws of nature from the observed events is physics.
Example for understanding: Suppose you are watching the game of cricket, you don't know the rules of cricket, then after watching the game carefully you may understand some of the rules of cricket, may be it will be wrong but you can predict some rules, same as in the game (phenomenon) of nature can be predicted by us(Scientist) and formulated law for that and the study of this laws is known as physics.
Physics and Mathematics
Physics and Mathematics have a great relation. To describe physics become easier when we use mathematics in it. but Physics is not mathematics, mathematics is the way to reach to that point, and the point is the physics.
Units
If we say that the lenght of that rod is 30. What does you understand from this. Do you get any information from this 30. My answer is 'yes' i get some information but not complete inf0rmation. From this i came to know that the length of rod is 30 times of certain thing.
Now what is that thing that to which the lenght of rod is 30 times. Consider it you finger. so the length of rod become 30 times of your finger. So here finger is the unit.
but finger cannot be used as unit because it is not universal. The length of finger of every person varies and so some universal measurement is made and that is known as Units.
Fundamental and Derived Quantities
Fundamental Quantities: Those quantities which are independent of other quantities are known as fundamental quantities.
example. lenght, mass, time etc.
here lenght do not depend upon other quantity, it is self sufficient to give all the information about it.
Derived Quantities: Those quantities which are dependent on other quantities are known as derived quantites.
example. Area, Volume, Speed etc.
here area is not independent it depend upon the length and breadth of that particular substance, so area is an derived quantities and it is derived from lenght.
SI Units
Fundamental or Base Quantities
Lenght meter m
Mass kilogram kg
Time secound s
Electric Current ampere A
Thermodynamic kelvin K
Temperature
Amout of Substance mole mol
Luminous intensity candela cd
SI Prefixes
power of 10 Prefix Symbol
1 deka da
2 hecto h
3 kilo k
6 mega M
9 giga G
12 tera T
15 peta P
18 exa E
21 zetta Z
24 yotta Y
-1 deci d
-2 centi c
-3 milli m
-6 micro u
-9 nano n
-12 pico p
-15 femto f
-18 atto a
-21 zepto z
-24 yocto y
Note: 1 million= 6 power of 10
1 billion= 9 power of 10
1 Trillion= 12 power of 10
Next Topic Dimensional analysis can be reffered from the book.
Reference Book: H.C. Verma
Pradeep's Publication book
What is Physics?
Do you find Physics is an interesting Subject? Most of you answer 'No' for it. Why? The reason behind this is that we are unable to understand physics fully and we are forced to study this subject to score mark in exam.
But Physics is really an interesting subject if we want to gain the real concept of Physics.
And here we are going to present the same to you.
Now, Physics is the study of nature and its laws. We expect that all these different events in nature take place according to some basic laws and revealing these laws of nature from the observed events is physics.
Example for understanding: Suppose you are watching the game of cricket, you don't know the rules of cricket, then after watching the game carefully you may understand some of the rules of cricket, may be it will be wrong but you can predict some rules, same as in the game (phenomenon) of nature can be predicted by us(Scientist) and formulated law for that and the study of this laws is known as physics.
Physics and Mathematics
Physics and Mathematics have a great relation. To describe physics become easier when we use mathematics in it. but Physics is not mathematics, mathematics is the way to reach to that point, and the point is the physics.
Units
If we say that the lenght of that rod is 30. What does you understand from this. Do you get any information from this 30. My answer is 'yes' i get some information but not complete inf0rmation. From this i came to know that the length of rod is 30 times of certain thing.
Now what is that thing that to which the lenght of rod is 30 times. Consider it you finger. so the length of rod become 30 times of your finger. So here finger is the unit.
but finger cannot be used as unit because it is not universal. The length of finger of every person varies and so some universal measurement is made and that is known as Units.
Fundamental and Derived Quantities
Fundamental Quantities: Those quantities which are independent of other quantities are known as fundamental quantities.
example. lenght, mass, time etc.
here lenght do not depend upon other quantity, it is self sufficient to give all the information about it.
Derived Quantities: Those quantities which are dependent on other quantities are known as derived quantites.
example. Area, Volume, Speed etc.
here area is not independent it depend upon the length and breadth of that particular substance, so area is an derived quantities and it is derived from lenght.
SI Units
Fundamental or Base Quantities
Lenght meter m
Mass kilogram kg
Time secound s
Electric Current ampere A
Thermodynamic kelvin K
Temperature
Amout of Substance mole mol
Luminous intensity candela cd
SI Prefixes
power of 10 Prefix Symbol
1 deka da
2 hecto h
3 kilo k
6 mega M
9 giga G
12 tera T
15 peta P
18 exa E
21 zetta Z
24 yotta Y
-1 deci d
-2 centi c
-3 milli m
-6 micro u
-9 nano n
-12 pico p
-15 femto f
-18 atto a
-21 zepto z
-24 yocto y
Note: 1 million= 6 power of 10
1 billion= 9 power of 10
1 Trillion= 12 power of 10
Next Topic Dimensional analysis can be reffered from the book.
Reference Book: H.C. Verma
Pradeep's Publication book
Friday, August 15, 2008
Newton's Laws
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