Question

Three blocks of masses 2 kg, 3 kg and 5 kg are connected to each other with light string and are then placed on a frictionless surface as shown in the figure. The system is pulled by a force $F = 10 N$ then tension $T _ { 1 } =$

• A. 1N
• B. 5 N
• C. 8 N
• D. 10 N

Answer 1

Answer: (C)

8 N

Answer 2

By comparing the above problem with general

expression.

$T _ { 1 } = \frac { \left( m _ { 2 } + m _ { 3 } \right) F } { m _ { 1 } + m _ { 2 } + m _ { 3 } }$ $= \frac { ( 3 + 5 ) 10 } { 2 + 3 + 5 }$ $= 8$ Newton