1. A block with a mass of 5.5 kg is subjected to two forces: a
force of 75.7 N to the right and 22 N to the left. The block is
accelerating at a rate of 1.9 m/s^2. What is the coefficient of
kinetic friction for the block and the surface it rests upon?
2. A block with a mass of 2 is pulled by a force of 10 N
inclined at an angle of 5 degrees above the horizontal. The block
is in motion. If the coefficient of kinetic friction is 0.33, what
is the acceleration of the block?
3. A block with a mass of 4.2 is pulled by a force of 20.8 N
inclined at an angle of 37 degrees above the horizontal. The block
is in motion. If the coefficient of kinetic friction is 0.5, what
is the acceleration of the block?
4. A block with a mass of 2 kg, in contact with a flat surface,
has a static coefficient of friction of 0.69 and a kinetic
coefficient of 0.36. The block is pulled with a horizontal force
which slowly increases. What minimum force is required to make the
object move?
5. A block with a mass of 3.5 kg, in contact with a flat
surface, has a static coefficient of friction of 0.64 and a kinetic
coefficient of 0.33. The block is pulled with a horizontal force
which slowly increases. What is the acceleration of the block the
moment it starts moving?
6. A block with a mass 4.3 kg lies on a board. If the board is
inclined, the block begins to slide at an angle of 27.5 degrees.
What is the coefficient of static friction between the block and
the board?