wooden plank, which is initially horizontal. One end of the plank is slowly raised to make it more and more inclined, and for a while the block stays in place on the plank and doesn't slide due to static friction. Finally, when the plank reaches an incline of 56.3o above horizontal, the block begins to slide. What is the coefficient of static friction between the block and the plank? 1.50 1.00 2.00 0.500
1.
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A block is placed on a wooden plank, which is initially horizontal. One end of the plank is slowly raised to make it more and more inclined, and for a while the block stays in place on the plank and doesn't slide due to static friction. Finally, when the plank reaches an incline of 56.3o above horizontal, the block begins to slide. What is the coefficient of static friction between the block and the plank?
1.50
1.00
2.00
0.500
2.
-
Continuing the story from the previous question... after the block begins sliding down the incline at 56.3o, you measure its acceleration down the plank as 7.42 m/s2. What is the coefficient of kinetic friction between the block and the plank?
0.136
0.241
0.190
0.562
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