Putting rotating cylinder on the ground

[srecko97]

Homework Statement

We put a cyllinder with unknown mass and radius 0.1m which rotates with angular velocity 10 /s around its geometric axis on the horizontal ground. After what time does the cyllinder roll without slipping? Coefficient of friction is 0.1.

Homework Equations

F=ma
M=J ⋅ ∝

The Attempt at a Solution

J- moment of inertia, k-coefficient of friction ... a* - acceleration of center of mass[/B]

The result should be 2.09 s. Please correct me!

 

[PeroK]

Are you sure you've stated the problem correctly? Your answer looks right to me.

 

[srecko97]

I have just realized that everything is OK except the value for angular frequency. The given frequency is not the angular (which I thought) but the usual frequency (number of turns per second)

 

[PeroK]

I have just realized that everything is OK except the value for angular frequency. The given frequency is not the angular (which I thought) but the usual frequency (number of turns per second)

Of course!