Question
Question: Two masses A and B of 10 kg and 5 kg respectively, are connected with a string passing over a fricti...
Two masses A and B of 10 kg and 5 kg respectively, are connected with a string passing over a frictionless pulley fixed at the corner of a table as shown in figure. The coefficient of friction of A with the table is 0.2. The minimum mass of C that may be placed on A to prevent it from moving is –
A
15 kg
B
5 kg
C
10 kg
D
0 kg
Answer
15 kg
Explanation
Solution
5g = 0.2(10 + m)g ̃ m = 15 kg