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Questions  

Three blocks of masses 3 kg, a kg and 5 kg are connected to each other with light strings and are then placed on a smoot} frictionless surface. Let the system be pulled with a force F from the side of lighter mass so that it moves with an acceleration of 1 m/s2. The value of F is 

a
12N
b
3N
c
4N
d
5N

detailed solution

Correct option is A

F =m a = (3 + 4 + 5) kg x 1m /s2 = 12N

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Statement II : The equality of mg and R has no connection with the third law.


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