Physics Practice Problems Forces in Connected Objects (Systems) Practice Problems Solution: A 5 kg box rests on top of a 10 kg box. The fricti...

Solution: A 5 kg box rests on top of a 10 kg box. The friction coefficients between the 10 kg box and the floor are μs1 = 0.4 and μk1 = 0.3, and the friction coefficients between the 10 kg box and the 5 kg box are μs2 = 0.35 and μk2 = 0.25. A horizontal force, F, is applied on the 10 kg box. What is the minimum value of F required to start moving the boxes? A) 29.4 N B) 39.2 N C) 44.1 N D) 58.8 N 

Problem

A 5 kg box rests on top of a 10 kg box. The friction coefficients between the 10 kg box and the floor are μs1 = 0.4 and μk1 = 0.3, and the friction coefficients between the 10 kg box and the 5 kg box are μs2 = 0.35 and μk2 = 0.25. A horizontal force, F, is applied on the 10 kg box. What is the minimum value of F required to start moving the boxes?

A) 29.4 N

B) 39.2 N

C) 44.1 N

D) 58.8 N