Find the velocity given coefficient of friction and radius?

AI Thread Summary
To determine the velocity at which the putty remains stationary on the edge of a disk with a radius of 0.2 meters and a static friction coefficient of 0.9, it's essential to analyze the forces acting on the putty. A free body diagram should be drawn to identify the relevant forces, including the frictional force and the centripetal force required to keep the putty in circular motion. The equation for centripetal acceleration (ac = v^2/r) can be used alongside the static friction force equation (Fs = M*N) to find the maximum velocity before the putty slips. The discussion emphasizes the importance of showing work and understanding the forces involved before seeking further assistance. Proper analysis of these concepts will lead to the solution.
Kataryx
Messages
1
Reaction score
0

Homework Statement


An disk has a radius of 0.2 meters. A lump of putty with a coefficient of static friction of 0.9 is stuck on the edge of the disk.

Let's say the disk starts at rest and gradually speeds up. At what speed will the putty just barely be able to stay in place on the edge of the disk?

Homework Equations


ac=v^2/r
at=(v-vi)/t
Fs=M*N

The Attempt at a Solution



I'm a bit stuck as to where I should start with this.[/B]
 
Physics news on Phys.org
Hi Kataryx,
Welcome to Physics Forums!

You need to show some work before help can be offered. Did you draw a free body diagram for the putty? What forces are acting?
 
Thread 'Collision of a bullet on a rod-string system: query'

Thread 'Collision of a bullet on a rod-string system: query'

In this question, I have a question. I am NOT trying to solve it, but it is just a conceptual question. Consider the point on the rod, which connects the string and the rod. My question: just before and after the collision, is ANGULAR momentum CONSERVED about this point? Lets call the point which connects the string and rod as P. Why am I asking this? : it is clear from the scenario that the point of concern, which connects the string and the rod, moves in a circular path due to the string...
View full post »

Similar threads

Maximum radius given rps, static and kinetic friction coefficients
Replies
3
Views
2K
Finding Force by using the coefficient of friction and mass
Replies
16
Views
3K
Find friction coefficient given initial and final velocity
Replies
3
Views
3K
How do i find the coefficient of static friction?
Replies
2
Views
2K
Find the velocity of a rolling disk at time t
Replies
18
Views
2K
What's the coefficient of kinetic friction?
Replies
8
Views
3K
Finding friction coefficient, car unbanked curve.
Replies
3
Views
3K
Banked Curve-Determine smallest static coefficient of friction
Replies
9
Views
4K
(Rotational Motion) Calculating maximum velocity.
Replies
2
Views
1K
Calculate the coefficient of static & kinetic friction
Replies
8
Views
7K

Hot Threads

Recent Insights

Back
Top