A student has a flat board and a small block. From the experiment, he wants to...

A student has a flat board and a small block. From the experiment, he wants to determine the coefficients of static and kinetic frictions.

A) Placing the block on the board, the student raises one end of the board slowly. When the board has a vertical height of 20.0 cm, the block begins sliding down the length of the board, 77.3 cm. Using this information, what is the coefficient of static friction?

B) As the block slid down the length of the board, it accelerated. If it took 1.60s for the block to slide down the full length of the board, calculate the coefficient of kinetic friction.

C) The student now lowers the angle of the board from parts A and B and pushes the block to start it moving. At what angle will the block slide down at a constant speed?

D) The student now sets the board at and angle of 30.0 degrees. As they put the block on the board, they begin pushing on the block, perpendicular to the board, to prevent it from sliding. What is the minimum force needed to do this?

Expert Solution

Motion and rest of a block on an inclined plane in presence of friction

genius_generous answered 2 months ago

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