Question

Does adding a mass to a wooden block, thereby increasing the normal force, give any apprecoable difference in the value of coefficient of static and kinetic friction found? Does it have any effect on the force of static or kinetic friction?

Answer 1

I did an experiment recently where I had to determine the coefficient of static friction and kinetic firction between a block on a table (horizontally) connected to a pulley with enough weight to accelerate the block horizontally as shown in this image:



There is a part in the experiment where I was suppose to add a mass on top of the block to make it heavier, but we didn't do that part of the experiment, so I'm not sure if she even wanted us to answer this particular question...