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				   sir,
i am facing problems to build concepts of energy conservatios in chapters like wpe,impulse momentum and rotational..plz tell me wat to do????????


6 years ago

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### Answers : (1)


Dear OCEAN  GODRE,

1) learn the corodinate systems thoroughly

there are 3 coordinate systems\
a)   cartesian coordintae systems

using these coordinates u can solve momentums and energy in XYZ coordinates
example :  momentum along x-aixs     m1*v1+m2*v2=m1u1+m2u2 like this

b)polar coordinates

spherical coordinates system is confusing but see the directions of  r, θ, Φ  so that u can dived momentums along those axes.

Cylindrical coordinates

x=rcosθ
y=rsinθ
z=z

these are the 3 important coordinate systems u have to remember.

using these coordinate systems we can ddived energy conservatios impulse momentum and rotational into 3 axes. after that apply conservation of momentum in x direction and y direction and z direction

after that u have to have knowledge on how many types of energies are there. kinetic(if m has some speed) , potential(if m has some height) , rotational( if m is rotating)
impulse =mv/t

$K_{rotation} = \frac{1}{2} I \omega^2$
where
ω is the angular speed$I \$ is the moment of inertia

Please feel free to ask your queries here. We are all IITians and here to help you in your IIT JEE preparation.
All the best.
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IIT Bombay


6 years ago

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