3. The box A has a mass of 80 kg, and the wedge B has a mass of 40 kg. μs between all contacting surfaces.. A 10° B 10° a. Figur 00-00-075- Copyright © 2008 on Prentice Hall. What force F is required to raise A at a constant rate? b. Will B remain in place if the force F is removed? = 0.15 and μk = 0.12