Three bodies are moving as shown below. The total kinetic energy of the whole system of the three masses is `-`

Options

A. Equal in reference frame of any mass
B. Maximum in reference frame of mass `A`
C. Maximum in reference frame of mass `B`
D. Maximum in reference frame of mass `C`

Answer

D

Explanation

Ans.(4)
In frame of `A` `:`
`K_(A)=(1)/(2)I(2-1)^(2)+(1)/(2)I(3+1)^(2)=8.5J`
In frame of `B` `:` `K_(B)=(1)/(2)I(2-1)^(2)+(1)/(2)I(3+2)^(2)=13J`
In frame of `C` `:`
`K_(C)=(1)/(2)I(3+1)^(2)+(1)/(2)I(3+2)^(2)=20.5J`