SureDen
ANNUAL EXAMINATION 2013-14
Position.
Position of an object or point is expressed in terms of co-ordinates.Position of any point is completely expressed by two factors: Its distance from the observer and its direction with respect to observer.
That is why position is characte
Formulas and Important Points
1. v = u+ at ... s=ut+(1/2)t2 ..... v2-u2 = 2as .....
If a particle is accelerated with constant acceleration in an interval of time, then the motion is termed as uniformly accelerated motion in that interval of time.For uniformly accelerated motion along a straight line, following equations can be used
(a) Ist equation of Motion
Motion With Uniform Velocity
Consider a particle moving along x-axis with uniform velocity u starting from the point x =xi at t = 0.
Equations of x, v, a are : x (t) = xi + ut ; v (t) = u ; a (t) = 0
x- t
Graphs
x-t graphs(Slope of x-t graph gives velocity)
a) for Rest
Position of Object Remains Same
x= constant
v=0
a=0
What is
The motion of an object is called two dimensional, if two of the three co-ordinates are required to specify the position of the object in space changes w.r.t time and
Triangle Law of Vector Addition of Two Vectors.
If two non zero vectors are represented by the two sides of a triangle taken in same order then the
Position
The position of a particle refers to its location in the space at a certain moment of time.
It is concerned with the question - “ where is the particle at a particular instant of time ? ”
(Stress)B(Stress)A=(rArB
If water drops are allowed to fall from a certain height at regular intervals, then the distance between two successive drops are always in the ratio 1: 3 : 5 : 7 : 9 &h
Rigid Body: A rigid body is a system of particles in which interparticle distances do not change and the
body cannot be deformed no matter how large a f
Slipping, Spinning and Rolling
Oscillatory or vibratory motion is that motion in which a body moves to and fro or back and forth repeatedly about a fixed point in a definite interval of time. In such a moti
Inertia.
It is the inherent property of all the bodies by virtue of which they cannot change their state of rest or uniform motion along a st
A motion, which repeat itself over and over again after a regular interval of time is called a periodic motion and the fixed interval of time after which the motion is repeate
The force of attraction of earth on bodies, is called force of gravity. Acceleration produced in the body by the force of gravity, is called acceleration due to gravity. It is represented by the symbol g.
In the absence of air resistance, it is found that all bodies (irresp
Velocity: Rate of change of position with time is called velocity.
(a) It is a vector quantity
Friction force is of two types.
a) Static&nbs
SWIMMER PROBLEMS
Consider a river of width D.
Let Vr= velocity of system
A wave is a disturbance which propagates energy and momentum from one place to the other without the transport of matter.
(1) Necessary properties of the me
Motion on a level circular road
When a vehicle goes round a level curved path, it should be acted upon by a centripetal force. While negotiating the curved path, the wheels of the car have a tendency to leave the curved path and regain the straight
Force
A pull or push which changes or tends to change the state of rest or of uniform motion or directionof motion of any object is called force. F
Rolling Without Slipping
In case of combined translatory and rotatory motion if the object rolls across a surface in such a way that there is no relative motion of
If acceleration is variable then you cannot apply equations of motion.
(i) If acceleration is a function of time
a=f(t)
use
VECTOR
A physical quantity having magnitude and direction and also obeying the law of vector addition is a vector quantity. A vector quantity is re
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