Question
Question: Two blocks A and B of masses 6 kg and 3 kg rest on a smooth horizontal surface as shown in fig. If c...
Two blocks A and B of masses 6 kg and 3 kg rest on a smooth horizontal surface as shown in fig. If coefficient of friction between A and B is 0.4, the maximum horizontal force which can make them without separation is –
A
72 N
B
40 N
C
36 N
D
20 N
Answer
36 N
Explanation
Solution
F = m(mA + mB) g = 0.4 (3 + 6) × 10 = 36 N