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Three blocks A, B and C of mass 4 kg , 2...

Three blocks A, B and C of mass 4 kg , 2kg and 1kg respectively , are in contact on frictionless surface as shown .If a force appliedon 14N is applied on the 4 kg block then the contact force between A and B is :

A

6N

B

8N

C

18N

D

2N

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