Question

Three blocks A, B and C weighing 1, 8 and 27 kg respectively are connected as shown in the figure with an inextensible string and are moving on a smooth surface. $T _ { 3 }$ is equal to 36 N. Then $T _ { 2 }$ is

• A. 18 N
• B. 9 N
• C. 3.375 N
• D. 1.25 N

Answer 1

Answer: (B)

9 N

Answer 2

$T _ { 2 } = \left( m _ { A } + m _ { B } \right)$ × $\frac { T _ { 3 } } { m _ { A } + m _ { B } + m _ { C } }$

$T _ { 2 } = ( 1 + 8 ) \times \frac { 36 } { ( 1 + 8 + 27 ) } = 9 \mathrm {~N}$