1) An object of mass 11.5 kg is accelerating with
acceleration 5.2 m/s^2 along horizontal surface under influence of
force F directed 30 degrees above horizontal. Coefficient of
kinetic friction between object and surface is 0.14. Find magnitude
of force F.
2) Two masses are connected through a pulley as it is shown
in the figure. Mass of object A is 12.4 kg; mass of object B is 1.9
kg; coefficient of kinetic friction between object A and incline is
0.13 . Angle theta created by the incline with horizontal is 30
degrees. Find magnitude of acceleration of object B.
3)Two masses are connected through a pulley as it is shown in
the figure. Mass of object A is 12.4 kg; mass of object B is 1.9
kg; coefficient of kinetic friction between object A and incline is
0.13 . Angle theta created by the incline with horizontal is 30
degrees. Find force of tension in the cord.