Finding Angular Velocity in Rotational Motion Problems

Click For Summary

Homework Help Overview

The discussion revolves around a problem related to rotational motion, specifically focusing on the conversion of angular velocity from revolutions per minute (rpm) to radians per second (rad/sec). Participants are exploring the accuracy of their calculations and the relevance of mass in the context of the problem.

Discussion Character

  • Exploratory, Assumption checking

Approaches and Questions Raised

  • The original poster attempts to convert 53 rpm to rad/sec and questions the accuracy of their final answer. They seek guidance on improving their understanding and approach to similar problems. Other participants confirm the conversion but question the necessity of further steps. The relevance of mass to the problem is also debated.

Discussion Status

The discussion is ongoing, with participants providing insights into the conversion process and questioning the need for additional calculations. There is a lack of consensus regarding the relevance of mass, with some asserting it is not pertinent to the problem.

Contextual Notes

Participants are navigating the specifics of unit conversion and its implications for the problem at hand, while also addressing potential misunderstandings related to the role of mass in rotational motion.

momoneedsphysicshelp
Messages
23
Reaction score
2
Homework Statement
A ball, 1.8 kg, is attached to the end of a rope and spun in a horizontal circle above a student's head. As the student rotates the ball in a horizontal clockwise circle their lab partner counts 53 rotations in one minute. What is the ball's angular velocity in radians per second?
Relevant Equations
1 rad/sec = 60/2pi rmp
53 rpm equals 5.55 rad/sec
multiply 5.55 by 2pi to get angular velocity of 34.8717

Is the answer 34.8717?

What should I have done to more accurately solve the problem with a better understanding?

What other steps should I take when solving similar problems?

and lastly,
Is the mass relevant to the problem in any way?
 
Physics news on Phys.org
momoneedsphysicshelp said:
53 rpm equals 5.55 rad/sec
Right. Why continue past that? You are asked for it in units of rad/sec.
 
momoneedsphysicshelp said:
Is the mass relevant to the problem in any way?
No.
 
Reply
  • Like
Likes   Reactions: momoneedsphysicshelp
haruspex said:
Right. Why continue past that? You are asked for it in units of rad/sec.
So this is only a conversion problem?
Thanks you very much.
 
When I turned in that answer, it was still wrong.
 
What answer ?
 

Similar threads

System of two wheels of different sizes with an axle through their centers
  • · Replies 67 ·
3
Replies
67
Views
4K
Change in Angular Velocity While Orbiting With No Torque
  • · Replies 30 ·
2
Replies
30
Views
4K
Angular velocity and angular acceleration of a turbine
  • · Replies 17 ·
Replies
17
Views
3K
Rotational Motion and moments of inertia
  • · Replies 9 ·
Replies
9
Views
2K
What Causes Discrepancies in Calculating Initial Angular Velocity?
  • · Replies 2 ·
Replies
2
Views
2K
Angular Velocity & Acceleration for a Series of Connected Objects
  • · Replies 1 ·
Replies
1
Views
2K
How Does Adding Masses Affect the Angular Velocity of a Rotating Cylinder?
  • · Replies 12 ·
Replies
12
Views
3K
Calculate the relative angular velocity
  • · Replies 2 ·
Replies
2
Views
2K
Finding the angular acceleration of a flywheel
  • · Replies 14 ·
Replies
14
Views
3K
Rotational Motion: Average angular acceleration of a CD
  • · Replies 2 ·
Replies
2
Views
6K