Monday, 16 March 2015

Uniform and Non uniform Circular motion

It is the circular motion or movement of an Object in circular path.

Uniform Circular Motion-
if the magnitude of particle velocity is constant or uniform along the circular path then it is called uniform circular motion

Non uniform circular motion-

if the magnitude of  particle velocity is not constant along the circular path then it is called non-uniform circular motion

note-

another type of motion also there when body rotate around itself and also does circular motion that type of motion called spinning motion .

ex-
spinning of planet around the Sun

Centripetal Acceleration -

when a body does circular motion , an acceleration acts on the body whose direction is always toward the centre of the circular path.
another name is Radial acceleration as it acts along the radius of circle
its unit is m/s2
 It is a vector quantity

Centripetal force-

it is a force that compel the body to move in circular path .
it always directed toward its centre .


Important -work done by centripetal force is zero
because both centripetal force and displacement are at right angle to each other

.

Sunday, 8 March 2015

Different between the Distance and Displacement

Many student little bit confuse about Distance and Displacement

Let us see define first
Distance- it is total path covered by any body to reach from one point to an other
Distance is a scalar quantity 

Displacement- it is the shortest distance that a body take reach the from one point to another
displacement is a vector quantity 

one question could be raised that
Is distance and Displacement can be equal

a) yes
b) no

Answer - No

because distance is a scaler quantity and displacement is vector quantity 
If we talk about Magnitude only than we can say both may be Equal