- #1

issacnewton

- 927

- 22

Hello

I am attaching a problem from Irodov's book "Problems in general physics". There is also a website where the solutions are given. I am just trying to understand the solution. Solution is given at http://irodovsolutionsmechanics.blogspot.com/2008_05_03_archive.html

Now in the problem I assumed that the particle keeps in touch with the trajectory for all the half circle. I think its a wrong assumption. Also the problem doesnt mention if the body starts rolling from the rest. does it matter ? In the solution given I have not understood how he got equation 1. If we use conservation of energy , then we will need to take care of the kinetic energy at the bottom. He doesnt use that kinetic energy at all. Also the problem just asks for the velocity of the body after breaking off the groove but this guy calculates the horizontal component of the velocity. Even at the back of the book, the horizontal component of the velocity is given. can somebody clarify ?

Issac N

I am attaching a problem from Irodov's book "Problems in general physics". There is also a website where the solutions are given. I am just trying to understand the solution. Solution is given at http://irodovsolutionsmechanics.blogspot.com/2008_05_03_archive.html

Now in the problem I assumed that the particle keeps in touch with the trajectory for all the half circle. I think its a wrong assumption. Also the problem doesnt mention if the body starts rolling from the rest. does it matter ? In the solution given I have not understood how he got equation 1. If we use conservation of energy , then we will need to take care of the kinetic energy at the bottom. He doesnt use that kinetic energy at all. Also the problem just asks for the velocity of the body after breaking off the groove but this guy calculates the horizontal component of the velocity. Even at the back of the book, the horizontal component of the velocity is given. can somebody clarify ?

Issac N