Messages posted by elessar_iitkgp

R should be known ...

The relation ship between x and t is

x=ut + (1/2) at^2

This is a quadratic in t and hence the graph is a parabola

Nice work Kalindi

First answer is zero, as A and B are shorted.

Sri Chaitanya's material is adequate for AIEEE. Just complete it thoriughly.

If you are getting civil you shoud take civil. Its one branch that is never going to die out and the options for reasearch as well as jobs are very good in civil.

Gud work Deepak

The dipole moment is from the hydroxyl bearing carbon to oxygen

http://www.goiit.com/posts/list/community-shelf-some-more-on-projectiles-a-few-shortcuts-13451.htm

http://www.goiit.com/posts/list/community-shelf-projectiles-continued-13453.htm

If y is a variable, there must be an additional relation between x and y to evaluate the integral. If y is a constant, then this is a standard integral and you can find it in any good book in the chapter of integration by parts.

Please state the question clearly

Specify the paper ... swearing on the community won't help ...

What paper? Plz be clear

Let the tension in the ring be T. Consider a small element on the circumfurence of the ring making an angle at the centre. Make the free body diagram of this element. The tension forces are tangential to this element. You can easily check that the net inward force on the element is . Equate this to the centrepetal force on the element and you'll get T.

If there is friction, the tension won't be uniform on the ring. The increment in tension across an element will equal the frictional force. The procedure is similar to the first part.

The cloth line sags at the centre due to its own weight

Refer to this link

http://www.clickindia.com/detail.php?id=158595

If you are asking for WBJEE, you need t follow the WB syllabus. For IITJEE, CBSE syllabus is very much similar

Take the edge of the topmost step as the origin. Write the equation of trajectory for the ball. Next, connect the edges of all the stairs. You'll see that this line forms an angle 45 with the horizontal. Its equation will be y = -x. Find the intersection point of this line and the particle's path. From the intersection point, you can count the no. of stairs

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