Lab 106 Oct17
Lab 106 Static and Kinetic Frictions
Objectives:
Our objectives are to measure the static and kinetic frictional forces using force sensors. Also, to determine the coefficient of static and kinetic frictional forces, amd the relationship between the frictional forces.
Background/Sketch: **attached**
Data Analysis:
Cart= 82.45g
Normal (N)
Static (N)
Kinetic(N)
100g
1.78
0.63
0.477
200g
2.76
0.83
0.716
300g
3.74
1.19
1.163
400g
4.72
1.67
1.520
500g
5.71
1.79
1.699
600g
6.69
1.88
1.670
1.00kg
10.60
2.92
2.713
Slope= .27
Part II
24-degree slope the 154g block starts to move and breaks the static friction force.
Calculations - **attached**
Conclusion:
This lab was pretty successful in the end. The % errors were only 1.8% and 25.1%. The 1.8% came from the kinetic friction, which was likely due to either round off errors or data that was slightly off. The 25.1% from the static friction can be due to a number of factors. The angle error is around 4 degrees less, so the angle could be a result of a different, extra frictional force during the experiment, which stops the block from moving. The experiment does not need much improvement since it ran pretty well. The picture below describes the force needed to pull the cart. Between A and B, is the force needed to build up to the maximum static frictional force. The peak, B, is the maximum static frictional force. The flat line is the kinetic frictional force needed to pull the cart. The normal force affects both frictional forces because it is the normal force multiplied by the coefficient of friction to get the frictional force. The static friction is always slightly higher than the kinetic friction, but seem to increase at the same rate.
Objectives:
Our objectives are to measure the static and kinetic frictional forces using force sensors. Also, to determine the coefficient of static and kinetic frictional forces, amd the relationship between the frictional forces.
Background/Sketch: **attached**
Data Analysis:
Cart= 82.45g
Normal (N)
Static (N)
Kinetic(N)
100g
1.78
0.63
0.477
200g
2.76
0.83
0.716
300g
3.74
1.19
1.163
400g
4.72
1.67
1.520
500g
5.71
1.79
1.699
600g
6.69
1.88
1.670
1.00kg
10.60
2.92
2.713
Slope= .27
Part II
24-degree slope the 154g block starts to move and breaks the static friction force.
Calculations - **attached**
Conclusion:
This lab was pretty successful in the end. The % errors were only 1.8% and 25.1%. The 1.8% came from the kinetic friction, which was likely due to either round off errors or data that was slightly off. The 25.1% from the static friction can be due to a number of factors. The angle error is around 4 degrees less, so the angle could be a result of a different, extra frictional force during the experiment, which stops the block from moving. The experiment does not need much improvement since it ran pretty well. The picture below describes the force needed to pull the cart. Between A and B, is the force needed to build up to the maximum static frictional force. The peak, B, is the maximum static frictional force. The flat line is the kinetic frictional force needed to pull the cart. The normal force affects both frictional forces because it is the normal force multiplied by the coefficient of friction to get the frictional force. The static friction is always slightly higher than the kinetic friction, but seem to increase at the same rate.