Hii can you answer With explaination please

9. At right is a picture of an Atwood's machine: two masses attached to a frictionless, massless pulley. The mass of block A is 5.0 kg and the mass of block B is 2.0 kg. a) What is the acceleration of the system when the blocks are released? What is the tension in the string? b) How long will it take for block A to fall 2.0 m? A B 10. a) mi = 5 kg and m2 = 8 kg. A block of mass mi is on a ramp that is inclined at 20 above the horizontal. It is connected by a string to a block of mass m2 that hangs over the top edge of the ramp. The m1 coefficient of kinetic friction between the incline and the mi block is m2 0.22. What is the acceleration of the masses and the tension in the 20 string? b) If mi = 8 kg, and the coefficient of static friction between mi and the incline is 0.300, find the maximum value of my that will not make mi slide up the incline (ie. when static friction is maximum)