Homework Statement
A thin uniform plank of length L lies at rest on a horizontal sheet of ice. If the plank is given a kick at one end in a direction normal to the plank, show that the plank will begin to rotate about a point located L/6 from the center.
Homework Equations
The friction...
I am now working on the Fourier transforms. Please help me how to find the Fourier transform of 1/(x square+ 4x + 13). The limit is minus negative to positive infinity so when I applied the formula the limit makes it all zero, which i do not think is the right answer. Shed some light where i...
Yes indeed, all it needed was a couple of bottles of beer to me,lol. Here's another problem am working on: Two particles moving under the influence of their mutual gravitational force describe circular orbits about one another with a period of T. If they are suddenly stopped and allowed to...
I tried like this: when k is halved, potential energy goes from -k/r to -k/2r (an
increase of k/2r) so that total energy is also increased by k/2r
(kinetic energy is unaffected). total energy before k halving K was
-k/2r. So it is now 0. As total energy goes to zero tha path is parabolic. How...
I equated the given force to the centrifugal force as the orbit is circular. Then i get the orbital velocity. Now after halving k and using the fact that angular momentum is constant in central force motion am still unable to get the final answer. Help me see what am missing. How do I get...
Homework Statement
A particle in circular orbit moves in a force field given by F(r)=-k/r^2. If k is halved what will the new orbit be?
Homework Equations
The answer is the orbit becomes parabolic but how? how does the total energy become zero as for parabolic orbits total energy=0...