PHYSICS   LECTURE   DEMONSTRATIONS

M-D2   :   Block on a Plane (II)

UNIT: Dynamics in 1-dim; kinematic friction
PURPOSE: Illustrate the concept of coefficient of kinematics friction
EQUIPMENT:
1. Incline Plane (a flat plank & support)
2. Assorted blocks of different surfaces, shapes
SUGGESTIONS: Using two sliding blocks in each run to compare the magnitude of kinematic friction, demonstrate dependence on mass (not dependent) and block surface for several fixed angles.
DISCUSSION: --

1.                                     2.                                          3.

4.                                                  5.

1. Equipment
2. Block stationary, static friction at 5N
3. Block stationary, static friction increased to 9N
4. Block stationary, static friction increased to 10N
5. Block begins to slide, kinetic friction at 4N