# Search results

1. ### First Area Moment and Centroidal Co-ordinates

1.Homework Statement There is a quarter circle.The centre of the circle of which the quarter circle is a part,is at the origin (0,0).Find the centroidal co-ordinates for the quarter circle.The equation of the circle for which the quarter circle is a part,is x2 +y2 = R2. where R is radius...
2. ### Newton's Laws Of Motion

INTRODUCTION: The following is a problem of "Newton's Laws Of Motion". It is a typical problem of this chapter. I am having problems with some parts. THE PROBLEM IN BLACK AND WHITE: "Find the acceleration a_{A}, a_{B} and a_{C} of the three blocks shown in the diagram (not included here)...
3. ### Relative Velocity concept help

I guess this is going to be my worst thread. I'm so sick of this stupid concept "relative velocity" that i'm in no mood to present this thread in my "exemplary style" for which i have been included in the "best homework threads" section. I'm sorry for that, but its true. I have no problems...
4. ### A few problems on MOTION IN ONE DIMENSION

A few problems on "MOTION IN ONE DIMENSION" INTRODUCTION: Here are a problem on "Motion in one-dimension". THE PROBLEMS: (1) "Car A is just behind Car B.Both are 5m long.The velocity of A is 15 m/s while that of B is 10 m/s. Find the road distnace covered by Car A to cross Car B." WHAT MY...
5. ### A few problems on Optics

INTRODUCTION: I am having problems solving Some Optics MCQs recently. THE PROBLEMS : (1) T is a point at the bottom of a tank filled with water, as shown in the diagram. The refractive index of water is 4/3.YPT is the vertical line through T.To an observer at the position O, T will appear to...
6. ### A Few Problems: MAGNETISM AND OPTICS

INTRODUCTION: Hi, here i am stuck with a few problems. One from Magnetism and the rest from Optics. THE PROBLEMS: (1) A wire PQ of mass m can slide frictionlessly on two conducting rails spaced a distance l. A current i flows on into the wire PQ with the help of a current generator.There is a...
7. ### Heating Effect Of Current

INTRODUCTION:Here is a problem on "Heating Effect Of Current".I can't understand a part of it. EXACT PROBLEM: "A battery of emf E and internal resistance r is supplying current to an external resistance R.(a)Show that the power dissipated in R will be maximum when R=r.(b)What is the maximum...
8. ### Magnetic Field due to a current

INTRODUCTION: I had been doing some problems on "Magnetic field due to a current." Now i have one in which one has to find the field at the centre of a regular n-sided polygon. I dont know why i'm not getting it. THE EXACT PROBLEM: "A regular polygon of n sides is formed by bending a wire of...
9. ### Current Electricity Concept

INTRODUCTION: I had been doing some current electricity froblems but now and then i'm having some problems with the distribution of current.I'm really confused. I have attached a figure with this thread, in which i've tried to combine all situations of current distribution in which i'm facing...