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 3 months ago

In an experiment, a student was asked to measure the desity of an unknown liquid. He...

In an experiment, a student was asked to measure the desity of an unknown liquid. He was given a small flask, which he found to have a mass of 32.6195 grams when empty. He filled the flask with water at 21.6 (0.997860 g/mL) degrees C and found the full flask to have a mass of 156.8995 grams. The student then emptied and dried the flask and then filled the flask with an unknown liquid. The mass of the flask filled...

The President of Lisavia (a small country) wants to increase productivity in his country. He has...

The President of Lisavia (a small country) wants to increase productivity in his country. He has recently become aware of an economic principle that suggests that as a nation's productivity rises, its income will rise and therefore its standard of living will also rise. You have just been appointed as the economic advisor for Lisavia. Discuss three economic policies you might advise the President to pursue in order for his country to achieve this increased standard of living. Develop a...

Bradley borrowed $72,500 in student loans and he has just graduated from Elon University. He earns...

Bradley borrowed $72,500 in student loans and he has just graduated from Elon University. He earns enough at his new job to allow him to pay $575 per month on the loan. If the annual rate on the student loan is 4.38% (compounded monthly), how long will it take Bradley to pay off his student loans? Specify the number of months to the nearest whole number Chandler found his dream mountain home, valued at $245,000. He plans to buy a...

A small bouncy ball is dropped from the flat roof of an abandoned, and as-yet unrepurposed...

A small bouncy ball is dropped from the flat roof of an abandoned, and as-yet unrepurposed industrial building. The ball is observed to take 1/8 of a second to fall across a broken window with the total height of 1.2m. After the ball hits the ground, it bounces back upward and again traverses the window’s height in 1/8s of a second on its way toward the top of the roof. We thus assume that the ball loses no energy upon...

(a). A college student is 23 years old and a recent graduate. He wants to start...

(a). A college student is 23 years old and a recent graduate. He wants to start saving for his retirement. He plans to save $2000 per year in an online stock account that pays annual return of 12%. If he sticks to the plan, how much money will he have at the age of 65? (make a time-line). (b). Suppose he starts saving for the retirement at the age of 40. If he uses the same plan above, how much...

graduate student wants to estimate the number of research participants he will see in the fall...

graduate student wants to estimate the number of research participants he will see in the fall semester. Using his data from the previous nine semesters, he tabulates a mean of 140 students per semester, although departmental records reflect a seasonal variation (i.e., population standard deviation) of 45 students. Calculate the 99% confidence interval.

Please explain in detail. a) A student performed a calorimetry experiment. He combined 50.0 mL of...

Please explain in detail. a) A student performed a calorimetry experiment. He combined 50.0 mL of water at 85˚C and 50.0 mL of water at 22˚C in a coffee cup calorimeter. The final temperature of the water was 45˚C. What was the heat capacity of the calorimeter? b) The same calorimeter was used to find the specific heat of a metal. He heated 95.22 grams of the metal in a boiling water bath (99˚C). After adding this hot metal to...

A student does an experiment to determine the molar solubility of lead(II) bromide. He constructs a...

A student does an experiment to determine the molar solubility of lead(II) bromide. He constructs a voltaic cell at 298 K consisting of 0.821 M lead nitrate solution and a lead electrode in the cathode compartment, and a saturated lead bromide solution and a lead electrode in the anode compartment. If the cell potential is measured to be 5.60*10-2 V, what is the molar solubility of lead bromide at 298 K determined in this experiment? mol/L

One student set up the experiment to study the behavior of the pendulum, he did 6...

One student set up the experiment to study the behavior of the pendulum, he did 6 trials, keeping the amplitude in 15 degree and changing the length of the pendulum, with a timing device he determines the period for different lengths. The experimental data is shown below, trial L[m] T[s] 1 0.5 1.37 2 0.6 1.50 3 0.7 1.63 4 0.8 1.74 5 0.9 1.85 6 1 1.96 To examine more carefully how the period, T depends on the pendulum...

A student does an experiment to determine the molar solubility of lead(II) iodide. He constructs a...

A student does an experiment to determine the molar solubility of lead(II) iodide. He constructs a voltaic cell at 298 K consisting of 0.730 M lead nitrate solution and a lead electrode in the cathode compartment, and a saturated lead iodide solution and a lead electrode in the anode compartment. If the cell potential is measured to be 8.05×10-2 V, what is the value of Ksp for lead iodide at 298 K based on this experiment? Ksp for PbI2 =...

Question