• Support PF! Buy your school textbooks, materials and every day products Here!

Angular Momentum question

  • Thread starter urapeach
  • Start date
  • #1
2
0
Here's a question:

A solid cylinder and hollow cylinder of the same mass and radius, both initally at rest, roll down the same inclined plane without slipping.

1) How do their rotational kinetic energies about the center of mass compare at the bottom?

2) If the plane was frictionless, which would reach the bottom first?

Thanks!! :tongue:
 

Answers and Replies

  • #2
203
0
Consider the mass distribution. If both cylinder have the same mass and radius, which one will have the larger value of I?
 
  • #3
Kurdt
Staff Emeritus
Science Advisor
Gold Member
4,812
6
Also remember in rotational problems such as this the total energy is that of the kinetic and rotational energy summed. Just thought that might help in the second part of the question.
 

Related Threads for: Angular Momentum question

  • Last Post
Replies
3
Views
6K
  • Last Post
Replies
0
Views
1K
  • Last Post
Replies
9
Views
2K
  • Last Post
Replies
2
Views
2K
  • Last Post
Replies
14
Views
7K
  • Last Post
Replies
4
Views
2K
  • Last Post
Replies
9
Views
815
  • Last Post
2
Replies
31
Views
3K
Top