Lab 2- Coefficients OF Friction Worksheet PHY10002 V2-2 PDF

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Lab 2- Coefficients OF Friction Worksheet PHY10002 V2-2, practical for physics, intro to physics....

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Lab 2 – COEFFICIENTS OF FRICTION LAST NAME:

FIRST NAME:

STUDENT ID:

TABLE #:

฀฀฀฀ (฀฀) =

฀฀฀฀ (฀฀) =

฀฀฀฀ (฀฀) =

Experiment 1 Determine ฀฀฀ ฀ ± ฀฀ for an area and mass of your choosing.

variable

Circle sled area used

•

DAY:

Hypothesis In words, write down how you expect mass and area to affect the coefficient of static and kinetic friction. Beneath this write down equations that matches your prediction (e.g. ฀฀฀฀ (฀฀) = ฀฀฀฀฀ ฀ + ฀฀).

฀฀฀฀ (฀฀) = •

TIME:

A

2A

3A

4A

Write tan ฀฀ to 3 decimal places 1

2

3

4

5A CALC

5

฀฀฀ ฀ ± ฀฀

Circle mass used variable

•

WORKSHEET+REPORT

M

A

2M

2A

3M

3A

4M

4A

5M

5A

M

2M

3M

4M

Write tan ฀฀ to 3 decimal places 1

2

3

4

5M CALC

5

฀฀฀ ฀ ± ฀฀

Theory sketch a free body diagram for your block on an incline, paying careful attention to the size of all force vectors. To the right of your diagram use Newton’s 2nd Law to derive an equation for ฀฀฀฀ and ฀฀฀฀ . ฀฀฀฀฀฀฀฀ = ฀฀฀฀ = 0

฀฀฀฀฀฀฀฀ = ฀฀฀฀ ≠ 0

Figure 1:

Experiment 2 Determine ฀฀฀ ฀ ± ฀฀ for an area and mass of your choosing. Plank length ฀ ฀ =

variable

Circle sled area used

•

A

cm

2A

3A

4A

Write travel time to 3 decimal places 1

2

3

4

5

Plank angle θ = 5A CALC ฀฀฀ ฀ ± ฀฀

Circle mass used variable

•

M

A

2M

2A

3M

3A

4M

4A

5M

5A

M

2M

degrees 3M

4M

Write travel time to 3 decimal places 1

2

3

4

5

5M CALC ฀฀฀ ฀ ± ฀฀

Analysis Sketch a graph of the mean of the static and kinetic coefficients of friction vs mass and area.

Coefficient of friction ( ฀฀฀฀ ฀฀฀฀฀฀ ฀฀฀฀ )

Coefficient of friction (฀฀฀฀ ฀฀฀฀฀฀ ฀฀฀฀

Use a different colour/symbol for ฀฀฀ ฀ and ฀฀฀ ฀ , include the standard deviation as an error bar and add a line of best fit.

Mass (arbitrary units) •

Area (arbitrary units)

Conclusion In words from your analysis what evidence supports or refutes your initial hypothesis....