Question

Three wooden boxes are connected by strings that pass over smooth and massless pulleys as shown in Figure A2. The coefficient of kinetic friction between the wooden box B and the surface of the table is 0.18. The boxes move to the right initially (a) Draw a free-body diagram for wooden box B. (b) If the mass of wooden box A is decreased from 10 kg to 5 kg, find the percentage (1 mark) increase of the acceleration of the three wooden boxes. (4 marks) 55 kg 10 kg A C 25 kg Figure A2
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