# Tough AP Test Question:Newton's Laws and Friction

1. Oct 19, 2005

### StarzGoalie30

Alright this is my first post so let me just say hi!

The problem reads something like this....
There is a table with a block, m2, resting on the surface. Another block, m1, is resting on top of the first block. m2 is connected to a string which goes over the table top, through a pulley, and hangs over the edge of the table. Connected to the string is another mass, M. Ignoring the mass and friction of the pulley, what will be the greatest magnitude of M that will keep the system at equilibrium? Also, when the system begins to accelerate so much that the top block begins to slide off the bottom block, what is the acceleration of m2 and m1.

Some other information.... the static friction between the m2 and m1 is equal to @s1 (where @ is the coefficient of friction). The static friction between m2 and the table is @s2. The kinetic friction between m2 and m1 is @k1. And the kinetic friction between m2 and the table is @k2.

The answers should be in all variables. Can anyone help with this?!

Thanks again, and can't wait to start posting more! :rofl:

2. Oct 19, 2005