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Three identical blocks of masses m=2kg a...

Three identical blocks of masses `m=2kg` are drawn by a force `F=10.2N` with an acceleration of `0.6ms^-2` on a frictionless surface, then what is the tension (in N) in the string between the blocks B and C?

A

9.2

B

7.8

C

4

D

9.8

Text Solution

Verified by Experts

The correct Answer is:
B
The system of masses is shown below
From the figure
`F - T_(2) = ma`
and `T_(1) - T_(2) = ma`
equation (I gives,
`10.2 - T_(1) = 2 xx 0.6` `implies` `T_(1) = 10.2 - 1.2 = 9N`
Again from equation (ii), we get `9 -T_(2) = 2 xx 0.6` `implies` `T_(2) = 9 - 1.2 = 7.8 N`
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