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Refer to diagram:Sorry guys. I posted an empty thread by mistake due to power failure. Here is the question.
Homework Statement
Point A moves uniformly with velocity v so that the vector v is continually "aimed" at point B which in its turn moves rectilinearly and uniformly ith velocity u <v. At the initial moment of time v is perpendicular to u and the points are separatd by distance k. How soon will the points meet?
The Attempt at a Solution
Sorry guys. I posted an empty thread by mistake due to power failure
You don't need "kinematics", or even acceleration, just a clear head (and enough light to see the problem!).Well, I havent studied kinematics in very much details, not even circular motion. But I am able to solve simple questions on circular motion. I know simple usage of basic calculus. Please guide me to solve this, as its been a long time since i hav been trying this question.
Yes, I know where point B is after time "t". It will travel "ut" in positive direction of x axis.ah … and I thought your dog ate it!
You don't need "kinematics", or even acceleration, just a clear head (and enough light to see the problem!).
You simply need to know what θ is (or tanθ) …
and you can work that out because you know exactly where B is at time t, and you just subtract (x,y) from that.
Hi tim~Hi ritwik06!
(x,y) is the position of A … x along the x-axis, and y up the y-axis.
As you say, B is at position (k,ut).
So the vector AB is (k - x, ut - y), and so tanθ = (ut - y)/(k - x).
Read this:So nobody could answer this here as well????
Well, I have shown all that I could. I have been trying to solve this for a long time. I have tried my best. I had even put it in introductory physics. The people who tried to help me did not have their concepts clear. I can even show you a PM from one of the members getting himself stuck at last and rgretting. Its now upto u whether u ish to help or not, of course if u know it urself.you have not done an attempt to solution.
Read it several times.
We NEVER solve problems here, we HELP people solving problems by giving hints and pushing in right direction.so nobody could solve it right now, eh?