Please provide detailed step by step solutions and attach units to every number,
1. Two blocks of mass m and 75 kg are connected via a light cord over a massless, frictionless pulley as shown in the attached figure. If the 75 kg block starts 2.0 m above the floor and takes 3.0 s to reach the floor when released from rest, what is the mass, m, of the other block?
2. My 17 kg son goes down a straight slide that makes a 40? angle with the horizontal. He starts 3.5 m above the ground and takes 1.5 s to reach the bottom when starting from rest. What is the coefficient of kinetic friction of the slide?