A and B objects are stacked on the horizontal table, as shown in the figure. The friction coefficient between B and the table is 0.4, and the mass of the two objects is Ma = 2kg and MB = 3kg respectively. When B is pulled by 30n horizontal force F, AB does not produce relative sliding, so the friction force on a is calculated

A and B objects are stacked on the horizontal table, as shown in the figure. The friction coefficient between B and the table is 0.4, and the mass of the two objects is Ma = 2kg and MB = 3kg respectively. When B is pulled by 30n horizontal force F, AB does not produce relative sliding, so the friction force on a is calculated

According to Newton's second law, F - μ (MA + MB) g = (MA + MB) a is solved as follows: a = 30 − 0.4 × (2 + 3) × 9.82 + 3 = 2.08m/s2 horizontally to the right