NEET 2015 Physics Newton's Laws of Motion MCQ Question
Three blocks A, B and C of masses 4 kg, 2 kg and 1 kg respectively, are in contact on a frictionless surface, as shown. If force of 14 N is applied on the 4 kg block, then the contact force between A and B is
2 N
6 N
8 N
18 N
Correct Answer
Detailed Explanation
The total mass is 7 kg, so the acceleration is a = rac{14}{7} = 2 \, ext{m/s}^2. The force on B is .
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