The three blocks shown are released from rest and are observed to move with accelerations that have a magnitude of 1.5 m/s2.

2. The three blocks shown are released from rest and are observed to move with accelerations that have a magnitude of 1.5 m/s2. What is the magnitude of the friction force on the block that slides horizontally? Disregard any pulley mass or friction in the pulley and let M= 2.0 kg.