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

Angular speed

If a wheel accelerates from rest at 1.0 m/s^2 and I need to find the instantaneous angular speed of the wheel at .10s would this be the proper formula:

final angular speed=initial angular speed + angular acceleration(change in time)

When I use this formula, it comes out to .10 rad/s which just seems to simple.
 
69
0
Well, you state the wheel accelerates from rest at 1.0m/s^2. m/s^2 is a measurement of linear acceleration not angular acceleration.
 
But how does the angular acceleration fit in then?

I have linear formulas, but I'm not sure which one I would use.
 
217
0
[tex] \alpha r = a [/tex]
 

andrevdh

Homework Helper
2,126
116
With a little bit of reasoning one could solve it with basic knowledge...
Via the linear acceleration one could calculate the linear velocity of the centre of the wheel after the given time. At this stage one could reason that the earth is moving with the same speed in the opposite direction while the wheel is standing still, hence the speed of rotation of the wheel since it is in contact with the earth.
 

Related Threads for: Angular speed

  • Posted
Replies
1
Views
1K
  • Posted
Replies
1
Views
899
  • Posted
Replies
1
Views
1K
  • Posted
Replies
7
Views
1K
  • Posted
Replies
1
Views
2K
  • Posted
Replies
2
Views
3K
  • Posted
Replies
0
Views
1K
  • Posted
Replies
5
Views
2K

Physics Forums Values

We Value Quality
• Topics based on mainstream science
• Proper English grammar and spelling
We Value Civility
• Positive and compassionate attitudes
• Patience while debating
We Value Productivity
• Disciplined to remain on-topic
• Recognition of own weaknesses
• Solo and co-op problem solving
Top