Messages posted by elessar_iitkgp

The term parabolic refers to the shape of the parabola. Please rephrase the question better so as we can understand in what context you want to know the meaning of this.

No standard solution book exists for H C Verma ... however, there are some local publications that give out solutions to selected ones ... u'll have to check in old book stores for that

Good answer @Tanveer.

The marks distribution pattern is variable each year, but according to the stats that Tanveer has provided, you can stress on different areas accordingly.

Good Work @ Abhishek

www.peg.com.mt/PDF/Physics.pdf

Firstly understand that friction will act up the surface of the bowl.

Now, assuming its crawling very slowly, its acceleration a = 0.

So

f = mgsin

where is the angle between the line joining the insect to the bowl's centre and the vertical.

As the insect rises, increases and so does sin. f increases accordingly. However, f can attain a maximum value of mgcos.

fmgcos

mgsinmgcos

tan

So after tan=, the insect can't crwal further as mgsin would exceed even the maximum value of f.

Height risen above the bowl bottom

h=R(1-cos)=

Substitute the value of coeff of friction to get answer.

The only differnce from the actual value of g is due to the rotation of the Earth itself. If the Earth stops rotating, the apparent value will be equal to the actual value.

As you can see in the expression derivedby No. if you put w=0, then g'=g always

For calculations involving rockets etc, the earth isn't used as a refernce system. Instead the reference frame attached to the sun's centre is used. It is called the heliocentric reference frame. Its is a much better approximation to an inertal frame.

I am outlining the method. Please do the necessary calculations.

Good answer @Nix. Very well answered. I'd just like to add a line:

Inertia isn't a force, its a state... the most natural state any body can have

Good Work @ Avinash

I think your approach is correct. I am also getting the same answer.

The approach suggested by C!-!!nmAY is correct

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