Hello …..

I have a problem wih myself in physics . I am able to study all the derivatives and memorise all the things tht is to be studied . But when it comes to numericals , I am totally blank . Please help me out. Even if i do the numericals i dont get the correct answer .

dear jeeva 
this clearly indicates that you are not understanding the concept , and just cramming it , 
and let me to tell 1 thing – you cannot understand physics by cramming . dnt try to do that . 
and before proceeding to numericals keep a look upon the following points 
1- make sure you have a clear understanding of besic maths , if not , then study that chapter , 
2- make sure u knows about unit conversion and can do it correctly . 
3- you need to be very clear with the diagrams . 
4- you need to guess the approx answer in long numericals . 
and solve as much examples as u can , u will become familier with that . 
ALL THE BEST 
REGARDS