 # 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???????? Rathod Shankar AskiitiansExpert-IITB
69 Points
11 years ago

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

All the best.

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Rathod Shankar Singh

IIT Bombay