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TM 225 Friction on the inclined plane



  • Dry friction on the inclined plane1
  • Fundamentals of mechanical friction


Technical Description

Friction experiments on the inclined plane help students to understand the fundamentals of mechanical friction.

The main elements of TM 225 are a sliding surface (the inclined plane), with an adjustable angle of inclination, and two samples. A sample is moved from the stationary state to the sliding state in two ways. In the first experiment, the plane is carefully tilted until the sample begins to slide downwards and the downward force is greater than the static friction force.

In the second experiment, a load acts as a tensile force upon the sample. The load is gradually increased until the sample begins to slide upwards in a uniform motion. The angle of inclination of the plane is not altered in this experiment.

Learning Objectives / Experiments
- determination of the friction coefficients of various material pairings
- transition from static to dynamic
- static equilibrium of forces on the inclined plane
- determination of the angle of inclination as from which sliding occurs (calculation and verification by experiment)


[1] experiment relating to friction on the inclined plane
[2] inclined plane with plastic coating, drag link with angle scale and ball bearing-mounted deflection roller
[3] angle of plane adjustable
[4] 2 samples: 1x steel / polypropylene, 1x aluminium / brass
[5] graduated load set 

Technical Data
Friction body
   - LxWxH: each 80x60x44mm
   - dead-weight force: each 10N
Inclined plane 
   - length: 1000mm
   - adjustable angle range: -45°...+45°
   - 1x 1N (hanger), 4x 0,1N, 1x 0,5N, 4x 1N, 1x 5N

Dimensions and Weight
LxWxH: 1130x300x800mm
Weight: approx. 35kg

Scope of Delivery
1 experimental unit, 1 set of loads, 2 samples, 1 set of instructional material

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