Question

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Answer 1

pls refer the attachment first for better understanding

Acceleration of all the masses will be the same

Acceleration of the system is given by ,

F= ma

F = (m 1 +m 2+ m 3) a

a = F /(m 1 +m 2+ m 3)

Let the contact force between A and B be N1

F - N 1 = m 1 a

N 1 = m 1 F /(m 1 +m 2+ m 3) - F

N 1 = m 1 F - m 1 F - m 2 F - m 3 F / (m 1 +m 2+ m 3)

N1 = -m 2F - m 3 F/(m 1 +m 2+ m 3)

Let the contact force between B and C be N 2

N 2 = m 3 a

N 2 = m 3 F /(m 1 +m 2+ m 3)