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Physics-

General

Easy

Question

Three identical bodies A, B and C each of mass 2kg are tied to a string over a smooth pulley as shown in the figure. The tension in the string connecting B to C is.

13 N
0.13 N
3.3 N
Zero

The correct answer is: 13 N

$a equals fraction numerator open parentheses m subscript 2 end subscript plus m subscript 3 end subscript close parentheses minus m subscript 1 end subscript over denominator m subscript 1 end subscript plus m subscript 2 end subscript plus m subscript 3 end subscript end fraction g$
$T equals m subscript 3 end subscript left parenthesis g minus a right parenthesis equals g divided by 3$

$T equals m subscript 3 end subscript open parentheses g minus a close parentheses$
$equals 2 open parentheses g minus g divided by 3 close parentheses$
$equals 2 cross times 2 cross times fraction numerator 10 over denominator 3 end fraction equals 13 N$

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