Three equal weight `A,B` and `C` of mass `2kg` each are hanging on a string passing over a fixed frictionless pulley as shown in the figure. The tension in the string connecting weights `B` and `C` is approximately

Options

A. zero
B. 3,3 N
C. 13,3 N
D. 19,6 N

Answer

C

Explanation

`a=((m+m)g-mg)/((m+m)+m)=(g)/(3)`

`mg-T=ma=(mg)/(3)`
`T=(2mg)/(3)=(2)/(3)xx2xx10`
13.3N