Question

Calculate uK

Run #	Experimental Condition	Total Block Mass (M)	Total Hanging Mass (m)	Measured Acceleration (“slope value”)	Calculated µk
Wooden Surface
1	Initial Block Mass Initial Hanging Mass	0.324 kg	0.1 kg	0.22 m/s2
2	Initial Block Mass Doubled Hanging Mass	0.324 kg	0.2 kg	1.5 m/s2
3	Doubled Block Mass Doubled Hanging Mass	0.648 kg	0.2 kg	0.19 m/s2
Felt Surface
4	Initial Block Mass Initial Hanging Mass	0.324 kg	0.1 kg	0.26 m/s2
5	Initial Block Mass Doubled Hanging Mass	0.324 kg	0.2 kg	1.9 m/s2
6	Doubled Block Mass Doubled Hanging Mass	0.648 kg	0.2 kg	0.4 m/s2
Cork Surface
7	Initial Block Mass Initial Hanging Mass	0.324 kg	0.1 kg	0.2 m/s2
8	Initial Block Mass Doubled Hanging Mass	0.324 kg	0.2 kg	1.7 m/s2
9	Doubled Block Mass Doubled Hanging Mass	0.648 kg	0.2 kg	0.12 m/s2

Answer 1

Net force acting on block

Net force acting on hanging mass

Adding above two equations,

Wooden surface:

1)

2)

3)

For Felt surface:

4)

5)

6)

For Cork surface:

7)

8)

9)