Question

3.2.25. [Level 2] cise 3.2.11 is using the same experimental procedure to de- termine the coefficient of static friction u, for another un- known material. This time, she spins the disk from rest with a constant angular acceleration of 6 = 0.7 rad/s, and she notes that the test mass slips after the disk rotates R= 1 rev. What is u, for the material? Suppose the engineer from Exer-

Answer 1

angle moved in one revoluation

For angular speed w at that time.

let body is at distance l from centre of disc.

Here distance of body from rotational centre is unknown so i have use .

please place value of l from figure.

I hope it helps you.

Thanks for asking.