Recent content by norhh

Try to derive it from formula said by grzz. u is initial velocity which is zero as they mentioned it that they dropped.

Yeah i forgot that thing.

It is a nice question.I am getting that acceleration of the T is (B/T)gtanθ and on the block is gsinθ.Just draw free body diagram.and now see forces acting on the incline(Do not forget that normal reaction due to block)find it and equate Fnet=ma.and done and second one acceleration is it is...

Ok you might not heard about stefan boltzman law P=σAT4.(where A is surface area:smile:) Where σ is called stefan boltzman constant its value is 5.670373(21)×10−8 W m−2 K−4. Now find it it is easy.

Same force acts on both the objects.If one object is positive and other is negative then then both come towards each other.Now take a direction as positive let it be right(positive x direction probable you can take reverse but i took like this).let + charge be on- x-axis and - charge on + right...

Thanks i did not knew that thing i thought light is both a particle and wave.

If light is a particle then it should definitely make sonic booms.but i did not find them even by keeping my er on light.ok light value is high but even if these guys did mistake in calculations then also it is definitely greater 1000km/hr but i would not happen.even for x-rays holds ssame.and...

yeah arihant olympiad is a good book first try reading concepts and do many new model problems as more as possible then i bet you can get it. 60 questions 2 hours is not sufficient so you need to be aware of that model question for section 1 only.For section 2 you need to think for that.

finally got it thanks

ooooooooo it has a velocity while falling and it cannot be equivalent to a freely falling bodyand i do not know how to start.And i do not know many formulas for ccollisions i forgot.i just need starting.

yes after that i do not know what to do

Homework Statement a ball falls under gravity from a height of 10m with an initial downward velocity v.It collides with the ground and looses 50% of its energy in collision and then rises to same height .1) find the initial velocity v 2)the height to which the ball rises after the collision...

Homework Statement a cyclist is moving on a level road at 4m/s stops pedaling and let's the wheels comes to rest the retardation of cycle has 2 components a constant 0.08m/s^2 due to friction in working parts and resistance of 0.02v^2/m where v is speed in m/s and distance tranversed by the...

Never think for solutions it is waste i bet best thing is going for this if you are an India or any way get this book indian national physics olympiad by A.B saurabh http://www.flipkart.com/indian-national-physics-olympiad-8188222704/p/itmdyv2szmabrrmt in that do level 1,level 2 which is enough...

wow i didn't know quantum mechanics when i solved irodov problems in relativity.no need i bet.just optics,electromagnetism(which i do not know) is far than needed just optics is required to understand the postulates.