What is the coefficent of the static friction between the backpack and the table?

October 20, 2009 by admin · 1 Comment
Filed under: Physics 
backpack
sol and sophie forever asked:


A backpack full of blocks weighing 60.0N rests on a table in a physics laboratory classroom. A spring with a force constant of 160N/m is attached to the backpack and pulled horizontally. If the backpack begins to slide when the spring (k=160N/m) strectches by 2.40cm, what is the coefficent of the static friction between the backpack and the table?

If you carry a backpack across campus. What is the work done by your vertical carrying force on the backpa?

October 18, 2009 by admin · 3 Comments
Filed under: Physics 
backpack
Pascal asked:


If you carry a backpack across campus. What is the work done by your vertical carrying force on the backpack?