Essay shows the determinants of static friction.
PART I
Aim - To investigate the linear relationship between static friction (FS) and the normal force (FN), i.e., (FS) = µS * (FN)
Theory -
Question - Why should you ensure that the string is parallel to the plane"
Answer - The string must be parallel to the plane, because only then will the tension in the string lie only in the horizontal direction. Only in this case will the horizontal force on the block be equal to the force exerted by the hanging weights.
Data Collection -
Reading NumberWeights used for blockUnits = kg; Each value, ± 0.0001kgWeights used on weight-holderUnits = kg; Each value, ± 0.0001kg
- 0.10260.0200,0.0078,0.0021
- 0.1026,0.04230.0200,0.0109,0.0042,0.0011
- 0.1026,0.0423,0.0438 0.0200,0.0197,0.0054,0.0021
- 0.1026,0.0423,0.0438,0.04170.0200,0.0212,0.0054,0.0042
- 0.1026,0.0423,0.0438,0.0417,0.04370.0200,0.0211,0.0197,0.0042,0.0016
- 0.1026,0.0423,0.0438,0.0417,0.0437,0.04280.0200,0.0212,0.0197,0.0109,0.0042,0.0021,0.0011
Data Processing and Presentation -
Reading NumberMass of Block (kg)Weight of Block (N)Mass on weight-holder (kg)Weight on weight-holder (N)
- 0.1026±0.0001kg1.005±0.0103N0.0299 ± 0.0002kg0.2932±0.0034N
- 0.1449±0.0001kg1.420±0.0145N0.0362 ± 0.0002kg0.3548±0.0041N
