In general work is said to done when a body moves in a certain distance when force is applied to that body.
Work:
The work done by a force acting on the body is defined as the product of the force and the displacement of the body in the direction of the force.
Constant Force :
If the force is constant and it displaces the body through a distance (s) in the same direction, then work done.
W
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Friction is define as the opposing force that try to resist the speed of the body.It is produced due to contact of two body or more with each other.
Friction :
When we try to slide a body on a surface, the motion of the body is opposed by a force called the force of friction. The frictional force arises due to intermolecular interaction.
When a body is at rest on a surface and no external force
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Sir Isaac Newton is one of the great scientist of the world.He has discovered many theories and law which are the pillar of the modern science.Among them, laws of motion is one of the significant discovery which is described below.
Newton’s First law : The law of inertia :
It states that every body continues to be in its state of rest or uniform motion in a straight line unless some external unb
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One of the many forms of motion is Circular Motion. A motion is called circular motion when centrifugal and centripetal forces act upon a moving body or the body moves in a circle. The different types of circular motion are:
Uniform Circular motion.
When a particle moves along a circular path with uniform speed, the
motion of the particle is said to be uniform circular motion.
Angular Velocity
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Maths formulas for physics:
Physics is possible only with the help of mathematics. We need to do a lot of mathematical calculation in Physics.
Mathematics simplifies and helps in solving the problems in physics.
Thus here are some Important mathematics formulas that are needed in physics to solve and simplify any problem:
So Mathematical formulas for physics are:
Geometry:
If Radius of a circle
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Vector Product:
If we multiply a vector with any other vector or scalar quantity then the result is called vector product.
Multiplying a vector by a scalar:
If we multiply a vector by a scalar , then the result is a new vector.
The magnitude of the vector formed by multiplying and , is the magnitude of multiplied by and the direction of the vector is same as vector if is positive an
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Two vector can be easily summed by using vector sum by geometrical method but it is not practical way to add vectors.
For a simpler and more practical way of adding two or more vectors then we can use component method of vector sum or add vectors by components.
Let there be three vector , and
and if vector is the sum of vectors and or ,
then,
The x component of vector r is the sum of
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Components of a vector:
The components of a vector are two or more vectors ( Usually vectors along the x , y , z axes) whose vector sum is equal to the given vector.
For ease in doing vector calculations Vectors are expressed in the form of two or three components ; Two if the vector is two dimensional and three if the vector is three dimensional .
Components of a Two dimensional vector:
Consider
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Unit Vector:
A unit vector is a vector that has a magnitude of exactly 1 unit and points in a particular direction.
A unit vector lacks both unit and dimension , But it have a magnitude of a unit and a certain direction. It’s sole purpose is to point toward a direction.
A unit vector is denoted by a letter above which a hat ( ) is placed.
The unit vector along any vector ( say vect
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In physics and mathematics many times we need to add or subtract Vectors.
Although there are many ways of combining vectors or adding and subtracting vectors , The simplest and most straight forward method of combining vectors is by graphical method or geometrical method.
In Geometric vector addition we mainly use following two laws of vector addition:
1> Law of triangle of vector addition :
Th
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