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In the arrangement shown in figure a 1 , a 2 , a 3 and a 4 are the accelerations of masses m 1 , m 2 , m 3 and m 4 respectively. Which of the following relation is true for this arrangement?

1. 4a 1 + 2a 2 + a 3 + a 4 = 0
2. a 1 + 4a 2 + 3a 3 + a 4 = 0
3. a 1 + 4a 2 + 3a 3 + 2a 4 = 0
4. 2a 1 + 2a 2 + 3a 3 + a 4 = 0

Correct answer: 4a 1 + 2a 2 + a 3 + a 4 = 0

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