Question

During an experiment, a block of mass M=0.20kg

is placed on a disk that rotates about an axle through its center, as shown in the diagram. The block is moved to different distances R from the axle, and the tangential speed of the block is gradually increased until the mass begins to slip. The distance and maximum tangential speed before slipping, vmax, are recorded. A student creates a graph of vmax2 as a function of R, as shown. How should the student use the graph to most accurately determine the experimental value of the coefficient of static friction μS between the block and the disk?

Answer 1

This should be used to Determine the slope of the best fit line and set it equal to μSg.

How to determine this

The experiment involves studying a block on a rotating disk, noting its maximum tangential speed (vmax) at different distances (R) before slipping occurs.

By using the slope and data points, especially the maximum and midpoint values on the graph, the student can accurately establish the experimental value of the coefficient of static friction (μS) governing the block's interaction with the rotating disk.