Kinetic Energy Of an rotating object!

  • Thread starter Duely Cack
  • Start date
  • #1
1. A 75-g phonograph album of 30-cm diameter spins at 33.3 rpm. What is its kinetic energy?
 

Answers and Replies

  • #2
LowlyPion
Homework Helper
3,097
5
1. A 75-g phonograph album of 30-cm diameter spins at 33.3 rpm. What is its kinetic energy?

Welcome to PF.

What are your thoughts on how to go about solving it.
 
  • #3
well i think that Kinetic Energy is 1/2mv2so is it like that but instead of v you put in the 33.3 rpm. like 1/2(75)(33.3)2 maybe?
 
  • #4
LowlyPion
Homework Helper
3,097
5
well i think that Kinetic Energy is 1/2mv2so is it like that but instead of v you put in the 33.3 rpm. like 1/2(75)(33.3)2 maybe?

What is the moment of inertia of the phonograph?

Using the moment of inertia what is the formula then for rotational kinetic energy?
 

Related Threads on Kinetic Energy Of an rotating object!

Replies
6
Views
3K
  • Last Post
Replies
1
Views
4K
Replies
8
Views
326
Replies
9
Views
11K
  • Last Post
Replies
1
Views
1K
  • Last Post
Replies
4
Views
2K
  • Last Post
Replies
8
Views
2K
Replies
2
Views
2K
Replies
3
Views
1K
  • Last Post
Replies
4
Views
4K
Top